Key Space and Period of Fialka M-125 Cipher Machine. - Eugen Antal; Pavol Zajac (Cryptologia, 2015)

On a mnemonic construction of permutations. - Eugen Antal; Otokar Grosek; Peter Horák (J. Math. Cryptol., 2017)

ManuLab System Demonstration. - Eugen Antal; Pavol Zajac (HistoCrypt, 2018)

Cryptology in the Slovak State During WWII. - Eugen Antal; Pavol Zajac; Otokar Grosek (HistoCrypt, 2019)

Remarks on breaking the Vigenère autokey cipher. - Otokar Grosek; Eugen Antal; Tomás Fabsic (Cryptologia, 2019)

HCPortal Overview. - Eugen Antal; Pavol Zajac (HistoCrypt, 2020)

Diplomatic Ciphers Used by Slovak Attaché During the WW2. - Eugen Antal; Pavol Zajac; Otokar Grosek (HistoCrypt, 2020)

HCPortal Modules for Teaching and Promoting Cryptology. - Eugen Antal; Pavol Zajac (HistoCrypt, 2021)

Solving a Mystery From the Thirty Years'War: Karel Rabenhaupt ze Such'e's Encrypted Letter to Landgravine Amalie Elisabeth. - Eugen Antal; Pavol Zajac; Jakub Mírka (HistoCrypt, 2021)

Wrong Design of Cipher Keys: Analysis of Historical Cipher Keys From the Hessisches Staatsarchiv Marburg Used in the Thirty Years' War. - Eugen Antal; Jakub Mírka (HistoCrypt, 2022)

Encrypted Documents and Cipher Keys From the 18th and 19th Century in the Archives of Aristocratic Families in Slovakia. - Eugen Antal; Pavol Marák; Pavol Zajac; Tünde Lengyelová; Diana Duchonová (HistoCrypt, 2023)

Education Tools for Teaching Classical Ciphers. - Marek Klimo; Eugen Antal; Miroslav Kvassay (IDT, 2023)

The first Czechoslovak cipher machine. - Eugen Antal; Pavol Zajac (Cryptologia, 2023)

The origin of military cryptanalysis in Czechoslovakia. - Eugen Antal (Cryptologia, 2024)

The Condenser PBJ cipher machine. - Eugen Antal; Paul Reuvers; Pavol Zajac (Cryptologia, 2025)