mesh - How to make the shapekey influence separate object's position? - Blender Stack Exchange
sculpting - How to add shape keys to high poly model? - Blender Stack Exchange
Corrective Shape Keys in Blender 2.8 - BlenderNation
rigging - how to make shape keys have several drivers, driven by single bone, and then they activate and then turn off when the bone moves to a certain value? - Blender
Shape Keys Option needs some changes - User Feedback - Blender Developer Talk