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Li, Yin; Qiu, Hua . (2019). Fractal sets in the field of <i>p</i> -adic analogue of the complex numbers. Fractals, (), S0218348X19500531–. doi:10.1142/S0218348X19500531 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research