There's a book by Walt Stanchfield (former head of animation at Disney) named "Figure drawing for animation" Although the name may have changed, it used to be a photocopied book passing from hand to hand, but I read it was about to be properly published.

Edit: memory failure (just woke up, I guess it counts as an excuse) The book is /Gesture/ drawing for animation, not figure drawing. I mentally mixed the article content with your reference :) The book is great, though.