References: Time derivative & Upwind Method

Smith, G. D.

Hughes, T. J.

A Simple Scheme for Developing Upwind Finite Element, Int. J. Num. Meth., Eng., Vol. 12, pp.1359-1365, 1978

Christie, I., Griffits, D. F., A. R. Mitchell and O. C. Zienkiewicz

Finite Element Methods for Second Order Equation with Significant First Derivatines, Int. J. Num. Eng. Vol. 10, pp.1389-1396, 1976

Fukumori, E.

Finite Element Method applied to a one-dimensional convection-diffusion problem, Rep. Dep. Civil Eng. Mechanics, Univ. Wisconsin-Milwaukee, 1987.

Fukumori, E. and Erik R. Christensen

Modeling inverse problem of particle-associated pollutants in lake sediment using the time domain method, Rep. Dep. Civil Eng. Mechanics, Univ. Wisconsin-Milwaukee, 1988.

Christensen, E. R., Eiji Fukumori

Notes on deconvolution of sedimentary records in the time domain, Rep. Dep. Civil Eng. Mechanics, Univ. Wisconsin-Milwaukee, 1987.

Fukumori, E. and Erik R. Christensen

"A model for ¹³⁷Cs and other tracers in lake sediments considering particle size and the inverse solution," Earth and Planetary Science Letters, Vol. 114, pp. 85-99, Elsevier Science Publishers B. V., Amsterdam, 1992.