The budget constrained r-interdiction median problem with capacity expansion. - Deniz Aksen; Nuray Piyade; Necati Aras (Central Eur. J. Oper. Res., 2010)

A Bilevel p-median model for the planning and protection of critical facilities. - Deniz Aksen; Necati Aras; Nuray Piyade (J. Heuristics, 2013)