Link to the source paper: http://delivery.acm.org/10.1145/2530000/2522721/p151-mashtizadeh.pdf?ip=78.193.6.23&id=2522721&acc=OA&key=24B49002E011608CF08962C63678

Link to the source paper: http://delivery.acm.org/10.1145/2530000/2522721/p151-mashtizadeh.pdf?ip=78.193.6.23&id=2522721&acc=OA&key=24B49002E011608CF08962C63678233A&CFID=400502279&CFTOKEN=45623156&__acm__=1389946062_8327da9921418091985f699c8d9c105c http://delivery.acm.org/10.1145/2530000/2522721/p151-mashtiz...