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An analysis of approximations for maximizing submodular set functions. I

Bibliographic reference Nemhauser, G.L. ; Wolsey, Laurence ; Fisher, M.L.. An analysis of approximations for maximizing submodular set functions. I. In: Mathematical Programming, Vol. 14, no. 3, p. 265-294 (1978)
Permanent URL http://hdl.handle.net/2078.1/66601