1 |  | A path to combinatorics for undergraduates : Counting strategies / Titu Andreescu, Zuming Feng . - Boston : Birkhäuser, 2004. - xviii, 228 p. : ill. ; 23 cm Mã xếp giá: 511.6 A558Đăng ký cá biệt: Lầu 2 KLF: 2000034511 |
2 |  | Sums and products / Titu Andreescu, Marian Tetiva . - Plano, TX : XYZ Press, 2018. - vi, 338p. ; 20 cm Mã xếp giá: 512.13 A558Đăng ký cá biệt: Lầu 2 KLF: 2000035682 |