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K. C. Nicolaou; Pradip K. Sasmal; Theocharis V. Koftis; Antonella Converso; Eriketi Loizidou; Florian Kaiser; A. J. Roecker; Constantinos C. Dellios; Xiao-Wen Sun; Goran Petrovic. (2005). Studies toward the Synthesis of Azadirachtin, Part 2: Construction of Fully Functionalized ABCD Ring Frameworks and Unusual Intramolecular Reactions Induced by Close-Proximity Effects. , 44(22), 3447–3452. doi:10.1002/anie.200500217 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research