• animation blend tree - ​http://www.chemical-games.com/?page_id=2201
• blend tree evaluation - ​http://www.chemical-games.com/wp-content/uploads/2012/05/blend_tree_evaluation.pdf
• multithreading - ​https://software.intel.com/en-us/articles/multithreading-the-rendering-pipeline-for-3d-model-animation
• unreal - ​https://docs.unrealengine.com/latest/INT/Engine/Animation/AnimationBlending/index.html
• blending for skinned mesh - ​http://www.gamedev.net/page/resources/_/technical/graphics-programming-and-theory/a-blending-animation-controller-for-a-skinned-mesh-r3592
• ozz-animation - ​https://code.google.com/p/ozz-animation
• batching - ​http://www.gamedev.net/topic/663061-is-it-possible-to-do-batch-rendering-with-3d-skeletal-animation-data/

Stack Exchange

• ​http://gamedev.stackexchange.com/questions/57645/desire-advice-on-implementing-this-animation-timeline-system\
• data driven animation states - ​http://gamedev.stackexchange.com/questions/27079/data-driven-animation-states