Whitmore, B. C., Lee, J. C., Chandar, R., Thilker, D. A., Hannon, S., Wei, W., Huerta, E. A., Bigiel, F., Boquien, M., Chevance, M., Dale, D. A., Deger, S., Grasha, K., Klessen, R. S., Kruijssen, J. M. D., Larson, K. L., Mok, A., Rosolowsky, E., Schinnerer, E., Schruba, A., Ubeda, L., Van Dyk, S. D., Watkins, E., & Williams, T. (2021). star cluster classification in the PHANGS–HST survey: Comparison between human and machine learning approaches. Monthly notices of the Royal Astronomical Society, 506(4), 5294–5317. http://access.bl.uk/ark:/81055/vdc_100139605974.0x000050