Sengupta, Jati. Efficiency models in data envelopment analysis : techniques of evaluation of productivity of firms in a growing economy / Jati Sengupta and Biresh Sahoo. - Basingstoke, England : Palgrave Macmillan, 2006. - xiv, 245 p. ISBN: 0230018866 : KES6187.50 Subjects--Topical Terms: Industrial productivity--Measurement.Industrial efficiency--Mathematical models.