@base . "Bulgaria" . a ; . a . , ; "Mathematica Æterna." ; ; ; ; ; ; ; "Mathematica Æterna (Online)" , "Mathematica Æterna." ; ; "https://www.longdom.org/mathematica-eterna/archive.html" , "http://www.e-hilaris.com/MAE.html" . a ; "1314-3336" ; . . a , ; "Mathematica Æterna (Online)" . a ; "20220920094355.956997"^^ ; ; .