@article{GDZPPN002341417,
title = {A counterexample to the L$^2$ estimate //Xyu//...C(//X...u// + //Y...u// + //u//).},
journal = {Mathematische Annalen},
volume = {305},
year = {1996},
pages = {93-98},
zbl = {0835.47037},
url = {http://dml.mathdoc.fr/item/GDZPPN002341417}
}
Wróblewski, Jaroslaw. A counterexample to the L² estimate //Xyu//...C(//X...u// + //Y...u// + //u//).. Mathematische Annalen, Tome 305 (1996) pp. 93-98. http://gdmltest.u-ga.fr/item/GDZPPN002341417/