@article{RO_2016__50_3_611_0,
     author = {Ben Brahim, Mouna and Zaccour, Georges and Ben Abdelaziz, Fouad},
     title = {Strategic investments in {R&D} and efficiency in the presence of free riders},
     journal = {RAIRO - Operations Research - Recherche Op\'erationnelle},
     pages = {611--625},
     publisher = {EDP-Sciences},
     volume = {50},
     number = {3},
     year = {2016},
     doi = {10.1051/ro/2015054},
     zbl = {1414.91255},
     mrnumber = {3538843},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/ro/2015054/}
}