%% -*-BibTeX-*- @Article{BleyBolandFrickeFroyland2009, author = "A. Bley and N. Boland and C. Fricke and G. Froyland", title = "A strengthened formulation and cutting planes for the open pit mine production scheduling problem", journal = "Computers and Operations Research", volume = "37", pages = "1641--1647", year = "2010", language = "English", }