@article{AL_2007_46_1_a6,
     author = {P. A. Schreiner},
     title = {Automatic recognition of interpolation in modal calculi},
     journal = {Algebra i logika},
     pages = {103--119},
     publisher = {mathdoc},
     volume = {46},
     number = {1},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2007_46_1_a6/}
}