@article{10_1090_S1079_6762_04_00139_8,
     author = {Damjanovi\"A‡, Danijela and Katok, Anatole},
     title = {Local rigidity of actions of higher rank abelian groups and {KAM} method},
     journal = {Electronic research announcements of the American Mathematical Society},
     pages = {142--154},
     publisher = {mathdoc},
     volume = {10},
     year = {2004},
     doi = {10.1090/S1079-6762-04-00139-8},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S1079-6762-04-00139-8/}
}