Babak, S., Petiteau, A., Sesana, A., Brem, P., Rosado, P., Taylor, S., et al. (2016). European Pulsar Timing Array limits on continuous gravitational waves from individual supermassive black hole binaries. Monthly Notices of the RAS, 455, 1665-1679. doi:10.1093/mnras/stv2092.