Differential interferometric phases at high spectral resolution as a sensitive physical diagnostic of circumstellar disksD. M. Faes, A. C. Carciofi, Th. Rivinius, S. Štefl, D. Baade and A. Domiciano de SouzaA&A, 555 (2013) A76DOI: https://doi.org/10.1051/0004-6361/201321313