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The (r,Q) control of a periodic-review inventory system with continuous demand and lost sales
Johansen, Soren Glud, (2000)
Can-order policies for coordinated inventory replenishment with Erlang distributed times between ordering
Schultz, Helle, (1999)
Optimal and approximate (Q, r) inventory policies with lost sales and gamma-distributed lead time
Johansen, Soren Glud, (1993)