@book{Dienst1975, author = {Dienst, Karl-Jakob}, title = {Zu Sekanten symmetrische Halbovoide / Karl Jakob Dienst}, publisher = {Techn. Hochsch., Fachbereich Mathematik}, address = {Darmstadt}, pages = {10 S.}, year = {1975}, language = {de} } @book{Dienst1975, author = {Dienst, Karl-Jakob}, title = {Schnitt- und Zykelgeometrien / Karl Jakob Dienst}, publisher = {Techn. Hochsch., Fachbereich Mathematik}, address = {Darmstadt}, pages = {39 S.}, year = {1975}, language = {de} }