@article{KUIPM_1981_9_9_a4,
     author = {I. Ya. Zabotin},
     title = {Choosing descent directions in unconstrained minimization problems},
     journal = {Issledovaniya po Prikladnoi Matematike i Informatike},
     pages = {37--42},
     year = {1981},
     volume = {9},
     number = {9},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUIPM_1981_9_9_a4/}
}