@article{ASNSP_1963_3_17_3_207_0, author = {Littman, Walter}, title = {Generalized subharmonic functions : monotonic approximations and an improved maximum principle}, journal = {Annali della Scuola Normale Superiore di Pisa - Scienze Fisiche e Matematiche}, pages = {207--222}, publisher = {Scuola normale superiore}, volume = {Ser. 3, 17}, number = {3}, year = {1963}, mrnumber = {177186}, zbl = {0123.29104}, language = {en}, url = {http://www.numdam.org./item/ASNSP_1963_3_17_3_207_0/} }