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Holub, Jan; Eigner, Václav; Vrzal, Lukáš; Dvořáková, Hana; Lhoták, Pavel . (2013). Calix[4]arenes with intramolecularly bridged meta positions prepared via Pd-catalysed double C–H activation. Chemical Communications, 49(27), 2798–. doi:10.1039/C3CC40655E 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research