Fast ray-tracing algorithm for circumstellar structures (FRACS) - I. Algorithm description and parameter-space study for mid-IR interferometry of B[e] starsG. Niccolini, P. Bendjoya and A. Domiciano de SouzaA&A, 525 (2011) A21DOI: https://doi.org/10.1051/0004-6361/201014511