Beijing Jiaotong University. 北京交通大学 图书馆 ( Beijing, China) [ALEPH 500] +
ISM University of Mangement and Economics. ( Vilnius, Lithuania) [ALEPH 500] +
Max Planck Institute for Mathematics. ( Bonn, North Rhine- Westphalia Germany) [ALEPH 500] +
Royal University of Phnom Penh. ( Phnom Penh, Cambodia) [ALEPH 500]
United Kingdom. ( London, England United Kingdom) [ALEPH 500] +
Universidad Nacional de Colombia. ( Bogota, Bogotá, Distrito Capital Colombia) [ALEPH 500] +