Two-dimensional narrow-band classification of M stars

von Gyldenkerne, Kjeld
Veröffentlicht in International Astronomical Union. Symposium. 24 (1966)

On the classification of early M giant stars by intermediate-band photometry of the 7050 Å TiO bands

von Boyce, Peter B.
Veröffentlicht in Publications of the Astronomical Society of the Pacific. 79. 1967 (1967)