On the uniqueness of search directions in variable-metric algorithms
1973 ◽
Vol 11
(6)
◽
pp. 590-604
◽
1973 ◽
Vol 27
(124)
◽
pp. 873-873
◽
1983 ◽
Vol 41
(3)
◽
pp. 439-450
2015 ◽
pp. 1515-1519