@article{VMUMM_2011_4_a7,
     author = {M. M. Izmailov},
     title = {The lattice of extensions of the modal logic of two equivalence relations has the cardinality of the continuum},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {46--48},
     publisher = {mathdoc},
     number = {4},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2011_4_a7/}
}