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Tetsunari Oyama; Yukio Koibuchi; Grace McKee. (2004). Core needle biopsy (CNB) as a diagnostic method for breast lesions: Comparison with fine needle aspiration cytology (FNA). , 11(4), 339–342. doi:10.1007/bf02968040 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research