Middleton, M., Fragile, P., Bachetti, M., Brightman, M., Jiang, Y., Ho, W., …Gehrels, N. (2018). Lense-Thirring precession in ULXs as a possible means to constrain the neutron star equation-of-state. Monthly Notices of the Royal Astronomical Society, 475(1), 154-166. https://doi.org/10.1093/mnras/stx2986