Journal of Mathematical Analysis and Applications, vol. 445, page. 1284 - 1290, 2017-01
Banach Journal of Mathematical Analysis, vol. 9, no. 4, page. 243 - 258, 2015-04
Journal of the Mathematical Society of Japan, vol. 66, no. 3, page. 957 - 979, 2014-07
Journal of Mathematical Analysis and Applications, vol. 409, no. 1, page. 147 - 157, 2014-01-01
NONLINEAR ANALYSIS-THEORY METHODS & APPLICATIONS, vol. 95, page. 323 - 332, 2014-01