TY - JOUR T1 - Detection of a period decrease in NN Ser with ULTRACAM: evidence for strong magnetic braking or an unseen companion JO - MON NOT R ASTRON SOC UR - http://eprints.whiterose.ac.uk/144717/ PY - 2006/01/01 AU - Brinkworth CS AU - Marsh TR AU - Dhillon VS AU - Knigge C ED - DO - DOI: 10.1111/j.1365-2966.2005.09718.x VL - 365 IS - 1 SP - 287 EP - 295 Y2 - 2024/09/20 ER -