The law of one price in data envelopment analysis: Restricting weight flexibility across firms. - Timo Kuosmanen; Laurens Cherchye; Timo Sipiläinen (Eur. J. Oper. Res., 2006)

Firm and industry level profit efficiency analysis using absolute and uniform shadow prices. - Timo Kuosmanen; Mika Kortelainen; Timo Sipiläinen; Laurens Cherchye (Eur. J. Oper. Res., 2010)