“…In the case N = 2, motivated by the Moser-Trudinger inequality (see Lemma 3), existence of nontrivial solutions to problems of the above type when f has exponential growth has been studied by many authors; see, for example, Carleson-Chang [9], Atkinson-Peletier [6], Shaw [40], Adimurthi et al [1][2][3][4], Cao [8], do Ó et al [34,35], de Figueiredo et al [16,17], Y.X. Li et al [25][26][27], Ruf [38], Lu and Yang [30,31], etc.…”