Recording with the Mid-Side Microphone Configuration | B&H eXplora
AxcessAbles MS-101 Microphone Stand with Boom Arm and XLR Audio Cable
Amazon.com: Zoom Am7 Android Stereo Microphone for Android Devices with USB-C Connector + Folding Smartphone Tripod Adapter + 12" Large Rubberized Spider Tripod + Professional Audio Bundle
Master Series by The Sound Professionals MS-WRITER-MIC-2 - Our best Steno Writer mic times two! Now, you get twice the pickup in a single ultra-high sensitivity, high-gain microphone MS-WRITER-MIC-2
UA WebZine "Analog Obsession" December 05 | The Mid-Side (MS) Stereo Microphone Technique