Electronic Resource
Jefferson, T. R.
;
Beckmann, M.
;
Peterson, D. W.
;
[et al.]
Wilhelm, J.
;
Kraft, M.
;
Schiemenz, B.
;
Boer, P.
;
Daal, J.
;
Telgen, J.
;
Becker, C.
;
Jahn, J.
Springer
Mathematical methods of operations research
24 (1980), S. 203-210