Burwitz, V. High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society;
Elebert, P., Callanan, P. J., Filippenko, A. V., Garnavich, P. M., Mackie, G., Hill, J. M., et al. (2008). Optical photometry and spectroscopy of the accretion-powered millisecond pulsar HETE J1900.1 − 2455. Monthly Notices of the Royal Astronomical Society, 383(4), 1581-1587. doi:10.1111/j.1365-2966.2007.12667.x.