@article{RSMUP_1996__95__29_0,
     author = {Yang Kok Kim},
     title = {Groups preserving the cardinality of subsets product under permutations},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {29--36},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {95},
     year = {1996},
     mrnumber = {1405353},
     zbl = {0864.20016},
     language = {en},
     url = {http://www.numdam.org/item/RSMUP_1996__95__29_0/}
}