Randomguess
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References
editHi Randomguess.
I have recently reverted your addition of references in a couple of places. I see that you have added similar references in other articles as well. There is probably nothing wrong with the material in these references, but you should know that lecture notes and the like do not count as reliable sources. What constitutes reliable sources is to some extent relative. It is often possible to find freely available reliable sources, even in the most demanding areas.
I am sorry for the reverts, and please don't think I am "policing you", but please be a bit more selective with references. In math/physics articles it is typically required that sources are published in peer-reviewed journals (having a DOI) or are notable textbooks/monographs (having a ISBN). Exceptions exist of course. YohanN7 (talk) 11:20, 19 May 2015 (UTC)