@article{paperid:1046784, author = {Jafarzadeh, Morteza and Tareghian, Hamed Reza and Rahbarnia, Freydoon and Ghanbari, Reza}, title = {Optimal selection of project portfolios using reinvestment strategy within a flexible time horizon}, journal = {European Journal of Operational Research}, year = {2015}, volume = {243}, number = {2}, month = {February}, issn = {0377-2217}, pages = {658--664}, numpages = {6}, keywords = {Project management; Projectp ortfolio selection; Project scheduling; Integer programming.}, }