@article{DAN_1991_319_6_a5,
     author = {L. L. Maksimova},
     title = {Beth properties, interpolation and amalgamation in varieties of},
     journal = {Doklady Akademii Nauk},
     pages = {1309--1312},
     publisher = {mathdoc},
     volume = {319},
     number = {6},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1991_319_6_a5/}
}