2006 August, Alexander V. Krivov, Artem G. Feofilov, Valeri V. Dikarev, “Search for the putative dust belts of Mars: The late 2007 opportunity”, in Planetary and Space Science, volume 54, numbers 9–10, →DOI, page 873:
To study the observability of the martian dust belts in this paper, we employed our dynamical code that numerically integrates orbit-averaged equations of motion of a circummartian particle in Lagrange elements derived by Krivov et al. (1996)[…], which we recently generalized to accommodate the Poynting–Robertson drag (Makuch et al., 2005).
