1. C. B. Morrey, “On the solutions of quasi-linear elliptic partial differential equations,” Trans. Amer. Math. Soc. 43, 126–166 (1938).
2. D. R. Adams, “Morrey Spaces,” in Lecture Notes in Appl. and Numer. Harm. Anal., (Birkhauser, Basel, 2015).
3. A. Almeida., J. J. Hasanov, and S. Samko., “Maximal and potential operators in variable exponent Lebesgue spaces,” Georgian Math. J. 1 (2), 195–208 (2008).
4. Y. Mizuta and T. Shimomura., “Sobolev embeddings for Riesz potentials of functions in Morrey spaces of variable exponent,” J. Math. Soc. Japan 1 (2), 583–602 (2008).
5. V. Kokilashvili and A. Meskhi., “Boundedness of maximal and singular operators in Morrey spaces with variable exponent,” Arm. J. Math. 1(1), 18–28 (2008).