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Dr. J. Beck; Prof. Dr. J. Strähle. (1987). Nitrido-Azido-Komplexe des Molybdän(VI): Synthese und Kristallstruktur von [MoN(N3)2(terpy)]+ [MoN(N3)4]−·MoN(N3)3 (terpy). , 554(11), 50–60. doi:10.1002/zaac.19875541107 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research