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Rebeca Fontanilla Andong,Edsel Sajor. (2017). Urban sprawl, public transport, and increasing CO2emissions: the case of Metro Manila, Philippines. Environment, Development and Sustainability, 19(1), 99–123. doi:10.1007/s10668-015-9729-8 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research