Jubilee speech of the Academician Ivan Yuhnovski, Head of the Bulgarian Academy of Sciences, held on 23 May 2003, published in Information BulletinDiarsipkan 2007-12-03 di Wayback Machine. of the Bulgarian Academy of Sciences, 3(62), Sofia, 27 June 2003 (in Bulgarian).
Jones, Terry. "Methodius". Patron Saints Index. Diarsipkan dari asli tanggal 2007-02-19. Diakses tanggal 2007-02-18.
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Adolf Heuken, SJ (1991), "Volume 1 : A-G", Ensiklopedi Gereja, Didigitalkan dari Universitas Michigan, Yayasan Cipta Loka Caraka, hlm. 193-194
Gerald O'Collins, SJ; Edward G. Farrugia, SJ (1996), Kamus Teologi (Edisi Cetakan ke-9, 2006), Penerbit Kanisius, hlm. 37, 89, 168, ISBN9789794975244, diarsipkan dari asli tanggal 2016-07-01, diakses tanggal 2016-05-25
Gerald O'Collins, SJ; Edward G. Farrugia, SJ (1996), Kamus Teologi (Edisi Cetakan ke-9, 2006), Penerbit Kanisius, hlm. 37, 89, 168, ISBN9789794975244, diarsipkan dari asli tanggal 2016-07-01, diakses tanggal 2016-05-25
Jubilee speech of the Academician Ivan Yuhnovski, Head of the Bulgarian Academy of Sciences, held on 23 May 2003, published in Information BulletinDiarsipkan 2007-12-03 di Wayback Machine. of the Bulgarian Academy of Sciences, 3(62), Sofia, 27 June 2003 (in Bulgarian).
