1. Equations of nonlinear acoustics;Kuznetsov;Sov. Phys. Acoust.,1970
2. Parametric acoustic array;Westervelt;J. Acoust. Soc. Am.,1963
3. Numerical Simulation of Mechatronic Sensors and Actuators, vol. 3;Kaltenbacher,2014
4. Nonlinear Acoustics, vol. 237;Hamilton,1998
5. A mixed finite element method for 2-nd order elliptic problems;Raviart,1977