@article{MT_2015_18_1_a3,
     author = {A. T. Nurtazin},
     title = {Countable infinite existentially closed models of universally axiomatizable theories},
     journal = {Matemati\v{c}eskie trudy},
     pages = {48--97},
     publisher = {mathdoc},
     volume = {18},
     number = {1},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_2015_18_1_a3/}
}