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De, Arijit Kumar; Goswami, Debabrata . (2009). Ultrafast pulse-pair control in multiphoton fluorescence laser-scanning microscopy. Journal of Biomedical Optics, 14(6), 064018–. doi:10.1117/1.3268440 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research