Search results
Set-Valued and Variational Analysis > 2013 > 21 > 2 > 201-216
Demonstratio Mathematica > 2013 > Vol. 46, nr 1 > 191--196
Open Mathematics > 2012 > 10 > 6 > 2229-2239
Central European Journal of Mathematics > 2012 > 10 > 6 > 2229-2239
Journal of Mathematics and Applications > 2010 > Vol. 33 > 61-65