Paudel, K., P. S. Bhandari, and J. Kafle. “Analytical Solution for Advection-Dispersion Equation of the Pollutant Concentration Using Laplace Transformation”. Journal of Nepal Mathematical Society, vol. 4, no. 1, May 2021, pp. 33-40, doi:10.3126/jnms.v4i1.37111.