Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1989_45_6_a1, author = {L. D. Beklemishev}, title = {Provability logic without {Craig's} interpolation property}, journal = {Matemati\v{c}eskie zametki}, pages = {12--22}, publisher = {mathdoc}, volume = {45}, number = {6}, year = {1989}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1989_45_6_a1/} }
L. D. Beklemishev. Provability logic without Craig's interpolation property. Matematičeskie zametki, Tome 45 (1989) no. 6, pp. 12-22. http://geodesic.mathdoc.fr/item/MZM_1989_45_6_a1/