ASUS 32GB Google Nexus 7" Tablet with 4G NEXUS7 ASUS-1B32-4G B&H
Flash Dirty Unicorns Android 7.1.1 Nougat Custom ROM on Nexus7
Nexus 7 (2012) – why are there no Android 10 or 9 ROMs available and why has the only Android 8.1 ROM available only been released recently? – EpicChasGamer.com
Nexus 7 (2012/2013), Nexus 10 get Android 5.1.1 factory image - Android Community
Android M on Nexus 7 2012 - Dmitry.GR
Unofficial Android Marshmallow build for Nexus 7 (2012) now available - GSMArena blog