<strike>According to the MathSciNet reviews these papers should do the trick:</strike>

It seems that these papers might be helpful, in conjunction with Dykin's paper *Maximal subgroups of the classical groups*:

Karpelevič, F. I. *The simple subalgebras of the real Lie algebras.* 
Trudy Moskov. Mat. Obšč. 4 (1955), 3–112. 

Karpelevič, F. I. *Classification of the simple subalgebras of the real forms of classical algebras.* Doklady Akad. Nauk SSSR (N.S.) 93, (1953). 613–616. 

Karpelevič, F. I. *Classification of the simple subgroups of the real forms of the group of complex unimodular matrices.* Doklady Akad. Nauk SSSR (N.S.) 85, (1952). 1205–1208.