Search results
Indian Journal of Pure and Applied Mathematics > 2018 > 49 > 4 > 671-688
Networks and Spatial Economics > 2015 > 15 > 3 > 765-790
Acta Mathematica Scientia > 2011 > 31 > 4 > 1503-1512
Indian Journal of Pure and Applied Mathematics > 2018 > 49 > 4 > 671-688
Networks and Spatial Economics > 2015 > 15 > 3 > 765-790
Acta Mathematica Scientia > 2011 > 31 > 4 > 1503-1512