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add various: Demonstration of gas diffusion; shows why "CO2 blankets" are very short term
* [https://www.youtube.com/watch?v=QUa0QH6niiQ Sour beer panel at the Firestone Walker invitational Beer Fest.]
* [https://www.youtube.com/watch?v=POPyCKVz0GQ Craft Commander interviews Michael Tonsmeire.]
* [https://www.youtube.com/watch?v=_oLPBnhOCjM Demonstration of gas diffusion; shows why "CO2 blankets" are very short term.]
==Commercial Brewer Interviews==