@article{01893536,
title = {Power weak mixing does not imply multiple recurrence in infinite measure and other counterexamples.},
journal = {The New York Journal of Mathematics [electronic only]},
volume = {9},
year = {2003},
pages = {1-22},
zbl = {1013.37005},
language = {en},
url = {http://dml.mathdoc.fr/item/01893536}
}
Gruher, Kate; Hines, Fred; Patel, Deepam; Silva, Cesar E.; Waelder, Robert. Power weak mixing does not imply multiple recurrence in infinite measure and other counterexamples.. The New York Journal of Mathematics [electronic only], Tome 9 (2003) pp. 1-22. http://gdmltest.u-ga.fr/item/01893536/