TY  - JOUR
A1  - Hellwig, Angelika
A1  - Volkmann, Lutz
T1  - Neighborhood and degree conditions for super-edge-connected bipartite digraphs
JF  - Results in mathematics
Y1  - 2004
SN  - 1420-9012 (E-Journal); 1422-6383 (Print)
VL  - Vol. 45
IS  - Iss. 1-2
SP  - 45
EP  - 58
ER  - 
TY  - JOUR
A1  - Hellwig, Angelika
A1  - Volkmann, Lutz
T1  - Sufficient conditions for λ′-optimality in graphs of diameter 2
JF  - Discrete mathematics
Y1  - 2004
SN  - 1872-681X (E-Journal); 0012-365X (Print)
VL  - Vol. 283
IS  - Iss. 1-3
SP  - 113
EP  - 120
ER  -