Deac taught at several colleges and universities and published over 40 scientific papers and books.[1] Augustin Deac brought a microfilm of the Rohonc Codex from Budapest, Hungary, to Romania, where it was studied by Viorica Enăchiuc.
Major works
Marea Unire(in Romanian)
Revizionismul ungar - factor destabilizator in Europa(in Romanian)
The History of the Historical Truth. Bucharest: Editura Tentant, 2001 Istoria Adevarului Istoric(in Romanian)
Mosii si Stramosii Poporului Roman. (in Latin)
Din istoria Ucrainei - "Tara de margine"(in Romanian)
Pagini din istoria adevarata a Bulgariei(in Romanian)
Mișcarea muncitorească din Transilvania 1890-1895 (in Romanian), Ed. Stiintifica, 1962.
Mari crime împotriva națiunii române (in Romanian), Bucharest: Bravo Press, 1996, ISBN973-97582-6-6.
O mie noua sute şapte vazut peste hotare, Bucharest: Ed. Stiintifica, 1967.