@article{urn:eudml:doc:43528,
title = {A spherical representation of the real directional derivative.},
journal = {Gaceta Matem\'atica},
volume = {28},
year = {1976},
pages = {25-29},
language = {en},
url = {http://dml.mathdoc.fr/item/urn:eudml:doc:43528}
}
González, M. O. A spherical representation of the real directional derivative.. Gaceta Matemática, Tome 28 (1976) pp. 25-29. http://gdmltest.u-ga.fr/item/urn:eudml:doc:43528/