"Boundary value problems." . . "Supersonic nozzles." . . "Nozzle geometry." . . . . . . "Screech tones of supersonic jets from bevelled rectangular nozzles"@en . . . . . . . . . . . . . . . . . . "Finite difference theory." . . . . "Supersonic jet flow." . . "Waveguides." . . "Mach number." . .