PŘÍHONSKÁ, J. The "sets of generated problems" with a view to use the graph coding close to solving of given problems. Annales Universitatis Paedagogicae Cracoviensis Studia Mathematica, [S. l.], v. 3, p. 207–214, 2003. Disponível em: https://studmath.uken.krakow.pl/article/view/13490. Acesso em: 30 oct. 2026.