@article{ASNSP_1997_4_24_3_511_0, author = {Boggiatto, P. and Buzano, E.}, title = {Spectral asymptotics for multi-quasi-elliptic operators in $\mathbb {R}^n$}, journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze}, pages = {511--536}, publisher = {Scuola normale superiore}, volume = {Ser. 4, 24}, number = {3}, year = {1997}, zbl = {0897.35056}, mrnumber = {1612397}, language = {en}, url = {archive.numdam.org/item/ASNSP_1997_4_24_3_511_0/} }
Boggiatto, P.; Buzano, E. Spectral asymptotics for multi-quasi-elliptic operators in $\mathbb {R}^n$. Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 24 (1997) no. 3, pp. 511-536. http://archive.numdam.org/item/ASNSP_1997_4_24_3_511_0/
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