The Rotation Period of Comet 29P/Schwassmann-Wachmann 1 Determined from the Dust Structures (Jets) in the Coma
A.V. Ivanova, V.L. Afanasiev, P.P. Korsun, A.R. Baranskii, M.V. Andreev, V.A. Ponomarenko
https://arxiv.org/abs/2012.09007

Photometric investigations of distant comets C/2002 VQ94 (LINEAR) and 29P/Schwassmann-Wachmann-1
A.V. Ivanova, P.P. Korsun, V.L. Afanasiev
https://arxiv.org/abs/2012.09008