Period variations the intermediate polars EX Hya, FO Aqr and RXS J180340.0+401214
We present results of CCD photometric study of the intermediate polars FO Aqr, EX Hya and RXS J180340.0+401214 = USNO-A2.0 1275-09738647 and corresponding corrected ephemerids.
astro-ph.SR↗