@article{bwmeta1.element.bwnjournal-article-apmv8i1p5bwm,
author = {Go\l \k ab, Stanis\l aw and Kucharzewski, M.},
title = {On the notion of gradient. II. A certain extremal property of direction of the gradient vector},
journal = {Annales Polonici Mathematici},
volume = {8},
year = {1960},
pages = {5-12},
zbl = {0092.14203},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-apmv8i1p5bwm}
}
Gołąb, Stanisław; Kucharzewski, M. On the notion of gradient. II. A certain extremal property of direction of the gradient vector. Annales Polonici Mathematici, Tome 8 (1960) pp. 5-12. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-apmv8i1p5bwm/