SiO Masers in Asymmetric Miras. IV. ? Cygni, R Aquilae, R Leo Minoris, Ru Herculis, U Herculis, and U OrionisDOI: info:10.1088/0067-0049/188/2/506v. 188506–525
Cotton, W. D., Ragland, S., Pluzhnik, E. A., Danchi, W. C., Traub, W. A., Willson, L. A., and Lacasse, Marc G. 2010. "SiO Masers in Asymmetric Miras. IV. ? Cygni, R Aquilae, R Leo Minoris, Ru Herculis, U Herculis, and U Orionis." The Astrophysical Journal Supplement Series, 188 506–525. https://doi.org/10.1088/0067-0049/188/2/506.