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Not all citations are equal: identifying key citations automatically -
"Suppose that you are researching a given issue. Maybe you have a medical condition or you are looking for the best algorithm to solve your current problem. A good heuristic is to enter reasonable keywords in Google Scholar. This will return a list of related research papers. If you are lucky, you may even have access to the full text of these research papers. Is that good enough? No." ‎- silpol