,. The vertical gradients in the Galactic rotation derived from the proper motions of the UCAC4 PPMXL and PPM catalogues. Вестник Санкт-Петербургского университета. Математика. Механика. Астрономия, [S. l.], v. 2, n. 3, p. 453–462, 2015. Disponível em: https://math-mech-astr-journal.spbu.ru/article/view/11180. Acesso em: 15 май. 2024.