It is just like the linear algebra over communtative ring(maybe advanced linear algebra),that is a nature extension and can make the structure of Lie algebra more algebraic,but I find little book discussing this topic.

I just know Weibei’s book “Homological Algebra” discuss something，but that is just a form,do not pay more attention to the Lie algebra and show some difference between field coefficient and ring coefficient. 

Does anybody know something else？