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Andreas A. Stefopoulos; Eleftherios K. Pefkianakis; Konstantinos Papagelis; Aikaterini K. Andreopoulou; Joannis K. Kallitsis. (2009). Carbon nanotubes decorated with terpyridine-ruthenium complexes. , 47(10), 2551–2559. doi:10.1002/pola.23339 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research