The Author, The Professor
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Academic Sources: Google Is Not the Only Answer
a) Topic explanation containing the abstract of its Wikipedia entry
Wikipedia joke-nominates Geometry Dash for deletion for April Fools Day : r/geometrydash
15 Useful Research Sites Every Student Should be Using
Introducing Google Scholar
Wikipedia: We Are Not Creating an Enhanced Service for Those Who Pay, but Tailoring Existing Services to Customer Needs - ITKeyMedia
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Browser extensions to make life easier: click & Read and Ophirofox - Les Bibliothèques Universitaires
Using Google, Wikipedia, Google Scholar, and an academic database for research