Analytical solutions of the Keller-Segel chemotaxis model involving fractional operators without singular kernelV. F. Morales-Delgado, J. F. Gómez-Aguilar, Sunil Kumar and M. A. Taneco-HernándezEur. Phys. J. Plus, 133 5 (2018) 200DOI: https://doi.org/10.1140/epjp/i2018-12038-6