PZM11 | Professional flush-mount boundary layer microphone
Crown Models PZM-30GPB, PZM-30D
SubZero SZM-B100 Boundary PZM Microphone at Gear4music
PZM!: The inexpensive mic that can do a lot! | Tape Op Magazine | Longform candid interviews with music producers and audio engineers covering mixing, mastering, recording and music production.
What is the use of Boundary/PZM Microphones? | Martin Mitchell's Microphones
Pressure Zone Microphones - History and other information