Joshi , H. ., and B. K. Jha. “Chaos of Calcium Diffusion in Parkinson’s Infectious Disease Model and Treatment Mechanism via Hilfer Fractional Derivative”. Mathematical Modelling and Numerical Simulation With Applications, vol. 1, no. 2, Dec. 2021, pp. 84-94, doi:10.53391/mmnsa.2021.01.008.