00338nas a2200121   4500000000100000000000100001008004100002100002500043245006500068856006900133300000600202490000800208       2020                            d1 aet E. Kravchenko al.00aLinear polarization in the nucleus of M87 at 7 mm and 1.3 cm  uhttps://ui.adsabs.harvard.edu/abs/2020A%26A...637L...6K/abstract  a90 v637