Comer\'on, F., Pasquali, A., Rodighiero, G., Stanishev, V., De Filippis, E., Lopez Marti, B., Galvez Ortiz, M.C., Stankov, A. and Gredel, R. (2002), "On the massive star contents of Cygnus OB2", A&A, 389: 874-888.
Abstract: None
Keywords: stars: early type, stars: luminosity function, mass function, open clusters and associations: individual: Cygnus OB2