(joint with B.D.Rouhani) Infinite time-dependent network equilibria with a multivalued cost function, Journal of Optimization Theory and Applications, Vol.131, No.3, pp.405-451, Decmber 2006

(joint with M.Amini) Duality and subdifferential for convex functions on complete CAT(0) metric spaces, Nonlinear Analysis 73 pp.3450-3455, 2010

joint with M.Amini) Nonlinear ergodic theorems in complete nonpositive curvature metric space, to appear in Bull. of Iranian Math. Soc. 2010