@article{VMJ_2012_14_1_a4,
     author = {A. E. Gutman},
     title = {An example of using $\Delta_1$ terms in {Boolean} valued analysis},
     journal = {Vladikavkazskij matemati\v{c}eskij \v{z}urnal},
     pages = {47--63},
     year = {2012},
     volume = {14},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMJ_2012_14_1_a4/}
}