Fitra Rama Putera
How to draw
How to draw hands
How to draw manga
I love the bold lines and the way the hand has been drawn in a variety of positions - Hand Study - Drawing Reference
I don't know about you, but hands are one of the hardest things to draw!
Easy way to draw fist [step-by-step].
Hands tutorial by the-evil-legacy — drawing anatomy
Hand expression drawing reference and poses
“Hands Tutorials for Those Who Hates Drawing Them” "Original can be found on Pixiv, (translated)
A wonderful book: Die Gestalt des Menschen by Gottfried Bammes