Completeness, functional completeness and relative completeness. Doroslovački, Rade, Pantović, Jovanka, Tošić, Ratko, Vojvodić, Gradimir (1999) Novi Sad Journal of Mathematics
Mono-unary algebras in the work of Czechoslovak mathematicians Miroslav Novotný (1990) Archivum Mathematicum
Univerzální algebry Ladislav Sedláček (1964) Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica-Physica-Chemica