@article{ASNSP_1977_4_4_4_637_0, author = {Rota, Gian-Carlo and Smith, David A.}, title = {Enumeration under group action}, journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze}, pages = {637--646}, publisher = {Scuola normale superiore}, volume = {Ser. 4, 4}, number = {4}, year = {1977}, mrnumber = {498171}, zbl = {0367.05008}, language = {en}, url = {http://www.numdam.org./item/ASNSP_1977_4_4_4_637_0/} }