Ask HN: An Advanced C Tutorial

Can any one point me to an Advanced C tutorial? I already know C++ quite in-depth but unfortunately never got to learn C. I was directly taught C++ in my high school, and then I went on to Matlab, Python, Java and finally advanced C++ (STL, why not to add default arguments in an overloaded virtual function, how virtual pointer table works and stuff). Thus now I wish to learn C really in depth!, this is partly by ongoing discussion about C++ which I can clearly identify with.