TY  - RPRT
TI  - Evaluation of the matrix exponential for use in ground-water-flow and solute-transport simulations; theoretical framework
AU  - A.M. Umari
AU  - S.M. Gorelick
PY  - 1986
DO  - 10.3133/wri864096
UR  - https://pubs.usgs.gov/publication/wri864096
ID  - wri864096
ER  -