Kumari, Mandeep, and Renu Chugh. “Strong Convergence for Nonexpansive Mappings by Viscosity Approximation Methods in Hadamard Manifolds”.
International Journal of Applied Mathematical Research, vol. 4, no. 2, Mar. 2015, pp. 299-07,
https://doi.org/10.14419/ijamr.v4i2.4239.