共 27 条
[12]
Delgado J., 2013, Oper. Theory Adv. Appl, V231, P103, DOI [10.1007/978-3-0348-0585-86, DOI 10.1007/978-3-0348-0585-86, 10.1007/978-3-0348-0585-8_6]
[19]
Hrmander L., 1967, Pseudo-differential operators and hypoelliptic equations., P138