@article{KUIPM_1992_19_19_a3,
     author = {I. Ya. Zabotin},
     title = {On some descent methods with respect to groups of variables},
     journal = {Issledovaniya po Prikladnoi Matematike i Informatike},
     pages = {24--33},
     year = {1992},
     volume = {19},
     number = {19},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUIPM_1992_19_19_a3/}
}