Gibson, M.A. and Bruck, J., 2000. Efficient exact stochastic simulation of chemical systems with many species and many channels. The journal of physical chemistry A, 104(9), pp.1876-1889.
Anderson, D.F., 2007. A modified next reaction method for simulating chemical systems with time dependent propensities and delays. The Journal of chemical physics, 127(21), p.214107.
See:
Gibson, M.A. and Bruck, J., 2000. Efficient exact stochastic simulation of chemical systems with many species and many channels. The journal of physical chemistry A, 104(9), pp.1876-1889.
Anderson, D.F., 2007. A modified next reaction method for simulating chemical systems with time dependent propensities and delays. The Journal of chemical physics, 127(21), p.214107.