104 Number Theory Problems Autor Titu Andreescu et al. 8 ian 2007 Paperback Preț: 449.22 lei 6-8 săpt.
A Path to Combinatorics for Undergraduates Autor Titu Andreescu et al. 11 noi 2003 Paperback Preț: 487.42 lei 6-8 săpt.