Source and Channel Models for Secret-key Agreement Based on Catalan Numbers and the Lattice Path Combinatorial Approach Autori: Muzafer Saračević, Saša Adamović, Nemanja Maček, Aybeyan Selimi, Selver Pepic Časopis: JOURNAL OF INFORMATION SCIENCE AND ENGINEERING DOI: 10.6688/JISE.202103_372.0012