@article{1102977727, author = {Lagrange, R. H.}, title = {On $({\germ m}-{\germ n})$ products of Boolean algebras.}, journal = {Pacific J. Math.}, volume = {31}, number = {3}, year = {1969}, pages = { 725-731}, language = {en}, url = {http://dml.mathdoc.fr/item/1102977727} }
Lagrange, R. H. On $({\germ m}-{\germ n})$ products of Boolean algebras.. Pacific J. Math., Tome 31 (1969) no. 3, pp. 725-731. http://gdmltest.u-ga.fr/item/1102977727/