# Search results

Proceedings - Mathematical Sciences > 2018 > 128 > 5 > 1-8

Annali di Matematica Pura ed Applicata ( 01923 -) > 2014 > 193 > 1 > 89-101

Demonstratio Mathematica > 2014 > Vol. 47, nr 1 > 103--124

Journal of Differential Equations > 2013 > 255 > 8 > 2363-2391

Physica D: Nonlinear Phenomena > 2012 > 241 > 4 > 333-349

Nonlinear Analysis > 2011 > 74 > 3 > 836-846

Demonstratio Mathematica > 2005 > Vol. 38, nr 2 > 365--386