Criptografie si securitatea informatiei - Aplicatii D.Naccache, E.Simion, A.Mihaita, R.F.Olimid, A.Oprina Ed. MatrixRom, Bucharest, 2011 Available here. |
Logica si problemele ei - vol.IV. Poveste de iarna A.Atanasiu, R.F.Olimid Bucharest, 2020 (it contains puzzles published on www.be-logic.ro in 2017) |