@article{RM_2015_70_6_a7,
     author = {M. E. Zhukovskii},
     title = {The spectra of first-order formulae having low quantifier rank},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {1176--1178},
     publisher = {mathdoc},
     volume = {70},
     number = {6},
     year = {2015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_2015_70_6_a7/}
}