1. Algorithm for the Solution of Initial-Value Problems;Cellier;Mathematics and Computers in Simulation,1978
2. Efficient Integration over Discontinuities;Carver;Mathematics and Computers in Simulation,1978
3. Efficient Automatic Integration of Ordinary Differential Equations with Discontinuities;Ellison;Mathematics and Computers in Simulation,1981
4. Efficient Step-Size Control for Output and Discontinuities;Gear;Transactions of SCS,1984