@article{JRAM_1970__245_151054,
     author = {Betty Kvarda Garrison},
     title = {A nontransformation proof of {Mann's} density theorem.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {41--46},
     publisher = {mathdoc},
     volume = {245},
     year = {1970},
     zbl = {0206.06203},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1970__245_151054/}
}