Voir la notice de l'article provenant de la source Math-Net.Ru
@article{AL_1982_21_2_a2, author = {Ya. M. Drugush}, title = {Union of logics modeled by finite trees}, journal = {Algebra i logika}, pages = {149--161}, publisher = {mathdoc}, volume = {21}, number = {2}, year = {1982}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1982_21_2_a2/} }
Ya. M. Drugush. Union of logics modeled by finite trees. Algebra i logika, Tome 21 (1982) no. 2, pp. 149-161. http://geodesic.mathdoc.fr/item/AL_1982_21_2_a2/