%0 Journal Article %A Vlach, Milan %A Zimmermann, Karel %T Optimal starting times for a class of single machine scheduling problems with earliness and tardiness penalties %J Kybernetika %D 1997 %P 675-686 %V 33 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/KYB_1997__33_6_a6/ %G en %F KYB_1997__33_6_a6