@article{HekmatSaleminkLauterbachetal.2004,
  author    = {Hekmat, Khosro and Salemink, B. and Lauterbach, Gerhard and Schwinger, R. H. G. and S{\"u}dkamp, M. and Weber, Hans-Joachim and Mehlhorn, U.},
  title     = {Interference by cellular phones with permanent implanted pacemakers: an update},
  series = {Europace. 6 (2004), H. 4},
  journal   = {Europace. 6 (2004), H. 4},
  pages     = {363 -- 369},
  year      = {2004},
  language  = {en}
}
@article{HellwigRautenbachVolkmann2004,
  author    = {Hellwig, Angelika and Rautenbach, Dieter and Volkmann, Lutz},
  title     = {Note on the connectivity of line graphs},
  series = {Information processing letters},
  volume    = {Vol. 91},
  journal   = {Information processing letters},
  number    = {Iss. 1},
  issn      = {1872-6119 (E-Journal); 0020-0190 (Print)},
  pages     = {7 -- 10},
  year      = {2004},
  language  = {en}
}
@article{HellwigVolkmann2004,
  author    = {Hellwig, Angelika and Volkmann, Lutz},
  title     = {Maximally local-edge-connected graphs and digraphs},
  series = {Ars combinatoria},
  volume    = {Vol. 72},
  journal   = {Ars combinatoria},
  issn      = {0381-7032},
  pages     = {295 -- 306},
  year      = {2004},
  language  = {en}
}
@article{HellwigVolkmann2004,
  author    = {Hellwig, Angelika and Volkmann, Lutz},
  title     = {Neighborhood and degree conditions for super-edge-connected bipartite digraphs},
  series = {Results in mathematics},
  volume    = {Vol. 45},
  journal   = {Results in mathematics},
  number    = {Iss. 1-2},
  issn      = {1420-9012 (E-Journal); 1422-6383 (Print)},
  pages     = {45 -- 58},
  year      = {2004},
  language  = {en}
}
@article{HellwigVolkmann2004,
  author    = {Hellwig, Angelika and Volkmann, Lutz},
  title     = {Sufficient conditions for λ′-optimality in graphs of diameter 2},
  series = {Discrete mathematics},
  volume    = {Vol. 283},
  journal   = {Discrete mathematics},
  number    = {Iss. 1-3},
  issn      = {1872-681X (E-Journal); 0012-365X (Print)},
  pages     = {113 -- 120},
  year      = {2004},
  language  = {en}
}
@inproceedings{HerrmannGraeterNava2004,
  author    = {Herrmann, Ulf and Graeter, F. and Nava, P.},
  title     = {Performance of the SKAL-ET Collector Loop at KJC Operating Company},
  series = {12th International Symposium Solar Power and Chemical Energy Systems, October 6-8, 2004, Oaxaca Mexico ; SolarPACES International Symposium, 12},
  booktitle = {12th International Symposium Solar Power and Chemical Energy Systems, October 6-8, 2004, Oaxaca Mexico ; SolarPACES International Symposium, 12},
  editor    = {Ramos, C.},
  publisher = {Instituto de Investigaciones Electricas},
  address   = {[s.l.]},
  isbn      = {968-6114-18-1},
  year      = {2004},
  language  = {en}
}
@article{Heuermann2004,
  author    = {Heuermann, Holger},
  title     = {A Synthesis Technique for Mono- and Mixed-Mode Symmetrical Filter},
  series = {Conference proceedings : Tuesday 12th, Wednesday 13th and Thursday 14th October, [RAI International Exhibition and Congress Centre, Amsterdam ; part of European Microwave Week 2004] / EuMA, European Microwave Association . Vol. 1},
  journal   = {Conference proceedings : Tuesday 12th, Wednesday 13th and Thursday 14th October, [RAI International Exhibition and Congress Centre, Amsterdam ; part of European Microwave Week 2004] / EuMA, European Microwave Association . Vol. 1},
  publisher = {Horizon House Publ},
  address   = {London},
  isbn      = {1-580-53992-0},
  pages     = {309 -- 312},
  year      = {2004},
  language  = {en}
}
@article{HeuermannErkens2004,
  author    = {Heuermann, Holger and Erkens, Holger},
  title     = {Blocking structures for mixed-mode systems. / Erkens, Holger ; Heuermann, Holger},
  series = {Conference proceedings : Tuesday 12th, Wednesday 13th and Thursday 14th October, [RAI International Exhibition and Congress Centre, Amsterdam ; part of European Microwave Week 2004] / EuMA, European Microwave Association. Vol. 1},
  journal   = {Conference proceedings : Tuesday 12th, Wednesday 13th and Thursday 14th October, [RAI International Exhibition and Congress Centre, Amsterdam ; part of European Microwave Week 2004] / EuMA, European Microwave Association. Vol. 1},
  publisher = {Horizon House Publ.},
  address   = {London},
  isbn      = {1-580-53992-0},
  pages     = {297 -- 300},
  year      = {2004},
  language  = {en}
}
@article{HeuermannRumiantsevSchott2004,
  author    = {Heuermann, Holger and Rumiantsev, A. and Schott, S.},
  title     = {Advanced on-wafer multiport calibration methods for mono- and mixed-mode device characterization},
  series = {On wafer characterization : 63rd ARFTG conference digest, spring 2004, 11 June 2004, Fort Worth, TX / Automatic RF Techniques Group. [Conference chair: John Cable. Publication chair: J. G. Burns]},
  journal   = {On wafer characterization : 63rd ARFTG conference digest, spring 2004, 11 June 2004, Fort Worth, TX / Automatic RF Techniques Group. [Conference chair: John Cable. Publication chair: J. G. Burns]},
  publisher = {IEEE Operations Center},
  address   = {Piscataway, NJ},
  isbn      = {0-7803-8371-0},
  pages     = {91 -- 96},
  year      = {2004},
  language  = {en}
}
@article{HeuermannSadeghfam2004,
  author    = {Heuermann, Holger and Sadeghfam, Arash},
  title     = {Novel balanced inductor for compact differential systems / Sadeghfam, Arash; Heuermann, Holger},
  series = {Conference proceedings : Tuesday 12th, Wednesday 13th and Thursday 14th October, [RAI International Exhibition and Congress Centre, Amsterdam ; part of European Microwave Week 2004] / EuMA, European Microwave Association},
  journal   = {Conference proceedings : Tuesday 12th, Wednesday 13th and Thursday 14th October, [RAI International Exhibition and Congress Centre, Amsterdam ; part of European Microwave Week 2004] / EuMA, European Microwave Association},
  publisher = {Horizon House Publ.},
  address   = {London},
  isbn      = {1-580-53992-0},
  pages     = {709 -- 712},
  year      = {2004},
  language  = {en}
}