Discovery of a complex spiral-shell structure around the oxygen-rich AGB star GX MonocerotisS. K. Randall, A. Trejo, E. M. L. Humphreys, H. Kim, M. Wittkowski, D. Boboltz and S. RamstedtA&A, 636 (2020) A123DOI: https://doi.org/10.1051/0004-6361/201935787
