Nixon, N., Guo, B., Garland, A., Kaylor-Hughes, C., Nixon, E., & Morriss, R. (2020). The bi-factor structure of the 17-item Hamilton Depression Rating Scale in persistent major depression; dimensional measurement of outcome. PLoS One.

Nixon, Neil, Boliang Guo, Anne Garland, Catherine Kaylor-Hughes, Elena Nixon, and Richard Morriss. "The Bi-factor Structure of the 17-item Hamilton Depression Rating Scale in Persistent Major Depression; Dimensional Measurement of Outcome." PLoS One 2020.

Nixon, Neil, et al. "The Bi-factor Structure of the 17-item Hamilton Depression Rating Scale in Persistent Major Depression; Dimensional Measurement of Outcome." PLoS One 2020.