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Li, Jingcheng; Merino-Díez, Nestor; Carbonell-Sanromà, Eduard; Vilas-Varela, Manuel; de Oteyza, Dimas G.; Peña, Diego; Corso, Martina; Pascual, Jose Ignacio . (2018). Survival of spin state in magnetic porphyrins contacted by graphene nanoribbons. Science Advances, 4(2), eaaq0582–. doi:10.1126/sciadv.aaq0582 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research