Cineversity - Toon Rig Series
https://www.cineversity.com/vidplaylist/toon_rig_series
In this introduction you will learn what the toon rig preset is about and it’s use cases.
tutorial series on weight painting by Bret Bays:
Weight Painting> Siggraph 2015 Rewind: Bret Bays – Weighting Workflows for Cinema 4D Character>
tutorial series on biped rigging by bret bays: Biped Rigging>