Period–Luminosity–Colour distribution and classification of Galactic oxygen–rich LPVs - I. Luminosity calibrationsD. Barthès, X. Luri, R. Alvarez and M. O. MennessierAstron. Astrophys. Suppl. Ser., 140 1 (1999) 55-67DOI: https://doi.org/10.1051/aas:1999518