Voir la notice de l'article provenant de la source Math-Net.Ru
@article{AL_1981_20_6_a3, author = {S. V. Popov}, title = {An undecidable intermediate calculus}, journal = {Algebra i logika}, pages = {654--706}, publisher = {mathdoc}, volume = {20}, number = {6}, year = {1981}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1981_20_6_a3/} }
S. V. Popov. An undecidable intermediate calculus. Algebra i logika, Tome 20 (1981) no. 6, pp. 654-706. http://geodesic.mathdoc.fr/item/AL_1981_20_6_a3/