Calibration of the distance scale from galactic Cepheids - I. Calibration based on the GFG sampleG. Paturel, G. Theureau, P. Fouqué, J. N. Terry, I. Musella and T. EkholmA&A, 383 2 (2002) 398-409DOI: https://doi.org/10.1051/0004-6361:20011786
