@article{RSMUP_1981__65__9_0,
     author = {Parlamento, Franco},
     title = {Binumerability in a sequence of theories},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {9--12},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {65},
     year = {1981},
     mrnumber = {653277},
     zbl = {0484.03033},
     language = {en},
     url = {http://www.numdam.org/item/RSMUP_1981__65__9_0/}
}