You can certainly start with eLearning Industry's Learning Management Systems list where you can "find, choose and compare the eLearning Industry's Top LMS Software."
eLearning Industry also hosts "the top articles about Learning Management Systems, their benefits, concepts, features and many more from the best eLearning authors." Get started here.
Since you've already started a list, some of the items in this article you've already addressed.
Here is a list of Learning Management Systems eBooks that may be helpful.
Learning Guild published a 5-article series from Steve Foreman, Five Steps to Evaluate and Select an LMS: Proven Practices.
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