@article{GDZPPN002028476,
title = {Extremal Tests for Scalar Functions of Several Real variables at Degenerate Critical Points. (Short Communication).},
journal = {Aequationes mathematicae},
volume = {13},
year = {1975},
pages = {109-110},
zbl = {0316.26008},
url = {http://dml.mathdoc.fr/item/GDZPPN002028476}
}
Cushing, J.M. Extremal Tests for Scalar Functions of Several Real variables at Degenerate Critical Points. (Short Communication).. Aequationes mathematicae, Tome 13 (1975) pp. 109-110. http://gdmltest.u-ga.fr/item/GDZPPN002028476/