@article{KUIPM_1992_18_18_a6,
     author = {I. Ya. Zabotin},
     title = {Methods of descent over groups of variables for a class of constrained minimization problems},
     journal = {Issledovaniya po Prikladnoi Matematike i Informatike},
     pages = {48--59},
     year = {1992},
     volume = {18},
     number = {18},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUIPM_1992_18_18_a6/}
}