@article{1093636941, author = {Doets, Kees}, title = {On $n$-equivalence of binary trees.}, journal = {Notre Dame J. Formal Logic}, volume = {28}, number = {1}, year = {1987}, pages = { 238-243}, language = {en}, url = {http://dml.mathdoc.fr/item/1093636941} }
Doets, Kees. On $n$-equivalence of binary trees.. Notre Dame J. Formal Logic, Tome 28 (1987) no. 1, pp. 238-243. http://gdmltest.u-ga.fr/item/1093636941/