@article{1200770216,
author = {Ludington, Anne L.},
title = {A counterexample to two conjectures about high order derivations and regularity},
journal = {Osaka J. Math.},
volume = {14},
number = {1},
year = {1977},
pages = { 159-163},
language = {en},
url = {http://dml.mathdoc.fr/item/1200770216}
}
Ludington, Anne L. A counterexample to two conjectures about high order derivations and regularity. Osaka J. Math., Tome 14 (1977) no. 1, pp. 159-163. http://gdmltest.u-ga.fr/item/1200770216/