Lee, Chien-Hsiu Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;
Ngeow, C.-C., Lee, C.-H., Yang, M.-T.-C., Lin, C.-S., Hsiao, H.-Y., Cheng, Y.-C., et al. (2015). VI-band follow-up observations of ultra-long-period cepheid candidates in M31. The Astronomical Journal, 149(2): 66. doi:10.1088/0004-6256/149/2/66.