1. Fundamental and Applied Sciences Department; UniversitiTeknologi PETRONAS; 32610 Bandar Seri Iskandar Malaysia
2. Department of Mechanical Engineering; JNTUH College of Engineering Hyderabad; Hyderabad-500085 India
3. Department of Mathematics; Faculty of Mathematics and Computer Science; Babeş-Bolyai University; 400084 Cluj-Napoca Romania