Masreliez’s theorem 
Hello Doug, first thank you for your sensible recommendations on my talk page on minor edits. For years I have just followed the practise of fellow users, as you noted, without knowing there were any rules set.  As for your recent two reverts on Masreliez’s theorem, now in a state of siege as is my person by actions of user jps/SA. The first revert should not need any ref, since it is what the entire article is about. Maybe "key" could be replaced by something milder that a native speaker can find more proper? The second one I have supported before with 50 third party relevant references from Academic Search, which I reckon a reliable source, at least when it comes to just support a number, four of which are mentioned in the following text.