Borka D, Borka Jovanović V, Urošević D. Spectra of HB 21 supernova remnant: Evidence of spectra flattening at the low frequencies. RevMexAA [Internet]. 24 de abril de 2012 [citado 19 de mayo de 2024];48(1):53-60. Disponible en: https://revistas.unam.mx/index.php/revmexaa/article/view/31414