Tamura, N., Sharples, R., Arimoto, N., Onodera, M., Ohta, K., & Yamada, Y. (2006). A Subaru/Suprime-Cam wide-field survey of globular cluster populations around M87 - I. Observation, data analysis and luminosity function. Monthly Notices of the Royal Astronomical Society, 373(2), 588-600. https://doi.org/10.1111/j.1365-2966.2006.11067.x