Real R&D options with time-to-learn and learning-by-doing. - Nicos Koussis; Spiros H. Martzoukos; Lenos Trigeorgis (Ann. Oper. Res., 2007)

A stochastic model with interacting managerial operating options and debt rescheduling. - Marios Charalambides; Nicos Koussis (Eur. J. Oper. Res., 2018)