@article{10_4064_cm_43_1_47_54,
     author = {Richard D. Byrd and Justin T. Lloyd and James W. Stepp},
     title = {On the cardinality of set products in groups},
     journal = {Colloquium Mathematicum},
     pages = {47--54},
     publisher = {mathdoc},
     volume = {43},
     number = {1},
     year = {1980},
     doi = {10.4064/cm-43-1-47-54},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-43-1-47-54/}
}