A global cost Malmquist productivity index using data envelopment analysis. - Ghasem Tohidi; Shabnam Razavyan; Simin Tohidnia (J. Oper. Res. Soc., 2012)

Profit Malmquist Index and Its Global Form in the Presence of the Negative Data in DEA. - Ghasem Tohidi; Shabnam Razavyan; Simin Tohidnia (J. Appl. Math., 2014)

Measuring productivity change in DEA-R: A ratio-based profit efficiency model. - Simin Tohidnia; Ghasem Tohidi (J. Oper. Res. Soc., 2019)