Official microblogging original painting people photos - Micro Album - Picmia
Some great reference here i supose
how_to_draw_the_human_head_2 by draw as a maniac, via Flickr
Lines and Colors: a blog about drawing, painting, illustration, comics, concept art and other visual arts ? Proko drawing tutorialsPin page
Hands... by =moni158
How to Draw the Human Body - Study: Male Body Types Comic / Manga Character Reference
pixiv is an online artist community where members can browse and submit works, join official contests, and collaborate on works with other members.
Sketchbook Figure Studies 1 by Bambs79.deviantart.com on @deviantART