Loparic, M.; Pochet, Y.; Wolsey, L.A. - Center for Operations Research and Econometrics (CORE), … - 1999
The authors examine a variant of the uncapacitated lot-sizing model of Wagner-Within involving sales instead of fixed demands, and lower bounds on stocks. Two extended formulations are presented, as well as a dynamic programming algorithm and a complete description of the convex hull of solutions.