@article{Lerner_2001,
 author = {Lerner, Josh and Tirole, Jean},
 year = {2001},
 title = {The open source movement: Key research questions},
 pages = {819--826},
 volume = {45},
 number = {4-6},
 journal = {European Economic Review},
 doi = {10.1016/s0014-2921(01)00124-6}
}