@article{1183494789,
author = {Martin, R. S.},
title = {Note on functional forms quadratic in a function and its first $p$ derivatives},
journal = {Bull. Amer. Math. Soc.},
volume = {37},
number = {12},
year = {1931},
pages = { 464-467},
language = {en},
url = {http://dml.mathdoc.fr/item/1183494789}
}
Martin, R. S. Note on functional forms quadratic in a function and its first $p$ derivatives. Bull. Amer. Math. Soc., Tome 37 (1931) no. 12, pp. 464-467. http://gdmltest.u-ga.fr/item/1183494789/