@article{1102905499, author = {Harrell, R. E. and Karlovitz, L. A.}, title = {On tree structures in Banach spaces.}, journal = {Pacific J. Math.}, volume = {61}, number = {2}, year = {1975}, pages = { 85-91}, language = {en}, url = {http://dml.mathdoc.fr/item/1102905499} }
Harrell, R. E.; Karlovitz, L. A. On tree structures in Banach spaces.. Pacific J. Math., Tome 61 (1975) no. 2, pp. 85-91. http://gdmltest.u-ga.fr/item/1102905499/