@article{AL_2007_46_6_a4,
     author = {V. F. Murzina},
     title = {Freedom from the interpolation property for tense calculi associated with {Ershov} spaces},
     journal = {Algebra i logika},
     pages = {745--762},
     publisher = {mathdoc},
     volume = {46},
     number = {6},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2007_46_6_a4/}
}