New measurements of orbital period change in Cygnus X-3 N. S. Singh, S. Naik, B. Paul, P. C. Agrawal, A. R. Rao and K. Y. Singh A&A, 392 1 (2002) 161-167 Published online: 22 August 2002 DOI: 10.1051/0004-6361:20020923