Serrano-Cinca C, Y Fuertes-Callen and C Mar-Molinero (2005). “Measuring DEA Efficiency in Internet Companies.” Decision Support Systems 38(4): 557-573.
Serrano-Cinca C, Y Fuertes-Callen and C Mar-Molinero (2005). “Measuring DEA Efficiency in Internet Companies.” Decision Support Systems 38(4): 557-573.