Beogradski nalaz denara i Antoninijana. Septimije Sever - Valerijan. (Kroat.m.engl.Res.) The Singinudum Hoard of Denarii and Antoniniani. Septimius Severus-Valerian - Kondić, Vladimir (1969)
T.-p. in Bulgarian and English, text in Bulgarian with summary in English, p. 155-192.