@article{10_4153_CJM_1975_109_7, author = {Gaskill, H. S. and Platt, C. R.}, title = {Sharp {Transferability} and {Finite} {Sublattices} of {Free} {Lattices}}, journal = {Canadian journal of mathematics}, pages = {1036--1041}, year = {1975}, volume = {27}, number = {5}, doi = {10.4153/CJM-1975-109-7}, url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1975-109-7/} }