1. Alexov, A., Hessels, J., Mol, J.D., Stappers, B., van Leeuwen, J.: In: Mizumoto, Y., Morita, K.-I., Ohishi, M. (eds.) Astronomical Data Analysis Software and Systems XIX. Astronomical Society of the Pacific Conference Series, vol. 434, p. 193 (2010)
2. Alexov, A., Schellart, P., ter Veen, S., et al.: In: Ballester, P., Egret, D., Lorente, N.P.F. (eds.) Astronomical Data Analysis Software and Systems XXI. Astronomical Society of the Pacific Conference Series, vol. 461, p. 283 (2012)
3. Archibald, A.M., Kondratiev, V.I., Hessels, J.W.T., Stinebring, D.R.: Astrophys. J. 790, L22 (2014)
4. Backer, D.C., Kulkarni, S.R., Heiles, C., Davis, M.M., Goss, W.M.: Nature 300, 615 (1982)
5. Bassa, C.G., Patruno, A., Hessels, J.W.T., et al.: Mon. Not. R. Astron. Soc. 441, 1825 (2014)