• http://elibrary.matf.bg.ac.rs/handle/123456789/5701
• http://elibrary.matf.bg.ac.rs/handle/123456789/5695
• http://elibrary.matf.bg.ac.rs/handle/123456789/5420
• http://elibrary.matf.bg.ac.rs/handle/123456789/5388
• http://elibrary.matf.bg.ac.rs/handle/123456789/5696
• http://elibrary.matf.bg.ac.rs/handle/123456789/5389
• http://elibrary.matf.bg.ac.rs/handle/123456789/5702
• http://elibrary.matf.bg.ac.rs/handle/123456789/5425
• http://elibrary.matf.bg.ac.rs/handle/123456789/5416
• http://elibrary.matf.bg.ac.rs/handle/123456789/5398
• http://elibrary.matf.bg.ac.rs/handle/123456789/5428
• http://elibrary.matf.bg.ac.rs/handle/123456789/5399
• http://elibrary.matf.bg.ac.rs/handle/123456789/5703
• http://elibrary.matf.bg.ac.rs/handle/123456789/5400
• http://elibrary.matf.bg.ac.rs/handle/123456789/5448
• http://elibrary.matf.bg.ac.rs/handle/123456789/5401
• http://elibrary.matf.bg.ac.rs/handle/123456789/5449
• http://elibrary.matf.bg.ac.rs/handle/123456789/5485