TY - CPAPER AU - G. Basri AU - R. Laurent AU - F. Walter CY - Zurich, Switzerland N1 - JILA Pub. 2774 PB - Dordrecht, D. Reidel Publishing Co. PP - Zurich, Switzerland PY - 1983 TI - Period-activity relations in close binary systems UR - http://adsabs.harvard.edu/full/1983IAUS..102..199B ER -