@article{VMUMM_1989_4_a7,
     author = {D. B. Motorov},
     title = {Homogeneity and $\pi$-networks},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {31--34},
     publisher = {mathdoc},
     number = {4},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1989_4_a7/}
}