@article{VMUMM_1996_6_a18,
     author = {Yu. Lopez-Gomez},
     title = {Permanence of competing species},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {52--56},
     publisher = {mathdoc},
     number = {6},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1996_6_a18/}
}