Tests of stellar model atmospheres by optical interferometry - III. NPOI and VINCI interferometry of the M0 giant γ Sagittae covering 0.5–2.2 mM. Wittkowski, C. A. Hummel, J. P. Aufdenberg and V. RoccatagliataA&A, 460 3 (2006) 843-853DOI: https://doi.org/10.1051/0004-6361:20065853