Buckdahn, R., Quincampoix, M., Rainer, C., & Teichmann, J. (2010). Another proof for the equivalence between invariance of closed sets with respect to stochastic and deterministic systems. Bulletin Des Sciences Mathématiques, 134(2), 207–214. https://doi.org/10.1016/j.bulsci.2007.11.003