Dr. Dinh Thi Bich Luy - ISBN: 978-620-0-65764-0
Yashpalsinh Zala - ISBN: 978-620-0-66467-9
Stanimir Stoyanov, Todorka Glushkova, Emil Doychev - ISBN: 978-620-0-66430-3
Mostafa El-Qurashi, Aida El-Zawahry, Keinawi Abd-El-Moneem - ISBN: 978-620-0-09619-7
Bhagawan Bharali - ISBN: 978-620-0-66401-3
Todorka Glushkova, Asya Stoyanova-Doycheva, Vanya Ivanova - ISBN: 978-620-0-66437-2