@article{VMUMM_1997_4_a16,
     author = {E. E. Zolin},
     title = {The {Craig} interpolation property in logics of proofs with a strong provability operator},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {53--55},
     publisher = {mathdoc},
     number = {4},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1997_4_a16/}
}