Open Access System for Information Sharing

MATHEMATICA SCANDINAVICA, vol. 103, no. 1, page. 97 - 110, 2008-05

Journal of Mathematical Analysis and Applications, vol. 409, no. 1, page. 147 - 157, 2014-01-01

Transactions of the American Mathematical Society, vol. 367, no. 9, page. 6085 - 6101, 2015-09

NONLINEAR ANALYSIS-THEORY METHODS & APPLICATIONS, vol. 95, page. 323 - 332, 2014-01

JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS, vol. 390, no. 2, page. 549 - 555, 2012-06-15