Search results for: Guizhen Liu
Open Mathematics > 2013 > 11 > 2 > 308-321
Central European Journal of Mathematics > 2013 > 11 > 2 > 308-321
Open Mathematics > 2013 > 11 > 2 > 308-321
Central European Journal of Mathematics > 2013 > 11 > 2 > 308-321