“…For further information about Besicovitch almost periodic functions, Besicovitch almost automorphic functions and their applications, we refer the reader to [1,2,4,5,6,7,9,11,12], [13,14,15,16,29,31,32,35], [36,49,51,53,54,56,57,58,60] and references cited therein; we would like to specially emphasize here the important research monograph [55] by A. A. Pankov.…”