Prentice, SJ, Maguire, K, Boian, I, Groh, J, Anderson, J, Barbarino, C, Bostroem, KA, Burke, J, Clark, P, Dong, Y, Fraser, M, Galbany, L, Gromadzki, M, Gutierrez, CP, Howell, DA, Hiramatsu, D, Inserra, C, James, PA, Kankare, E, Kuncarayakti, H et al, Mazzali, PA, McCully, C, Mueller-Bravo, TE, Nichol, M, Pellegrino, C, Smartt, SJ, Sollerman, J, Tartaglia, L, Valenti, S and Young, DR (2020) SN 2018gjx reveals that some SNe Ibn are SNe IIb exploding in dense circumstellar material. Monthly Notices of the Royal Astronomical Society, 499 (1). pp. 1450-1467. ISSN 0035-8711