I need literature international standards regarding Average space per student in general classrooms, Average space per student in special classrooms such as libraries, computer laboratories, science laboratories, etc.
I attach a Literature Review done by Princeton in 2013 by an ad hoc Committee.
It contains all related literature. This passage in page 12 taken from Kiefer (2012) is directly related to what you are looking for:
"evaluating classroom space solely based on the number of students that fit in the room given the configuration of the space assumes that all seat - time is created equal. Instead, space planners should evaluate learning-per-square-foot and understand that different learning happens in tablet-arm chairs at the back of an over-crowded room than in swivel office chairs gathered around a small table with a few other students"
If you want classic square foot per head, you should search in standards in architecture.
"Learning Space" is an emerging field in HE research, but they are mostly philosophizing....like 'learning commons' etc