@article{1102983466, author = {Tucker, Richard R.}, title = {The $\delta^{2}$-process and related topics. II.}, journal = {Pacific J. Math.}, volume = {31}, number = {3}, year = {1969}, pages = { 455-463}, language = {en}, url = {http://dml.mathdoc.fr/item/1102983466} }
Tucker, Richard R. The $\delta^{2}$-process and related topics. II.. Pacific J. Math., Tome 31 (1969) no. 3, pp. 455-463. http://gdmltest.u-ga.fr/item/1102983466/