References

Shampine, L. (1999). Conservation laws and the numerical solution of ODEs, II. Computers & Mathematics with Applications 38, 61–72. Accessed on Sep 4, 2023.

Shampine, L. F.; Thompson, S.; Kierzenka, J. and Byrne, G. (2005). Non-negative solutions of ODEs. Applied Mathematics and Computation 170, 556–569.