Search results for: Guizhen Liu
Open Mathematics > 2011 > 9 > 6 > 1424-1434
Central European Journal of Mathematics > 2011 > 9 > 6 > 1424-1434
Open Mathematics > 2011 > 9 > 6 > 1424-1434
Central European Journal of Mathematics > 2011 > 9 > 6 > 1424-1434