1. The old galactic cluster NGC 188 and the origin of the W Ursae Majoris-type contact binaries
2. Becker, S. A. 1998, in ASP Conf. Ser. 135, A Half Century of Stellar Pulsation Interpretation: A Tribute to Arthur N. Cox, ed. P. Bradley & J. A. Guzik (San Francisco: ASP), 12
3. Deliyannis, C. P., Hainline, L. J., Sarajedini, A., Steinhauer, A. & Bailyn, C. D. 2003, in preparation
4. A Proper-Motion Membership Study of the Old Open Cluster NGC 188