Příhonská, J. (2003) “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, 3, pp. 207–214. Available at: https://studmath.uken.krakow.pl/article/view/13490 (Accessed: 30 October 2026).