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@article{MS2_1966__19_165969, author = {W.W. Boone and H., Jr. Rogers}, title = {On a {Problem} of {J.H.C.} {Whitehead} and a {Problem} of {Alonzo} {Church.}}, journal = {Mathematica Scandinavica}, pages = {185--192}, publisher = {mathdoc}, volume = {19}, year = {1966}, zbl = {0166.26503}, url = {http://geodesic.mathdoc.fr/item/MS2_1966__19_165969/} }
W.W. Boone; H., Jr. Rogers. On a Problem of J.H.C. Whitehead and a Problem of Alonzo Church.. Mathematica Scandinavica, Tome 19 (1966), pp. 185-192. http://geodesic.mathdoc.fr/item/MS2_1966__19_165969/