1. Miguel Reyes Adame, Jing Yu, Knut Möller, Edgar Seemann, “A Wearable Navigation Aid for Blind People Using Vibrotactile Information Transfer System”, Proceedings of 2013 ICME International Conference on Complex Medical Engineering, May 25 - 28, Beijing, China.pp. 978-1-4673-2971-2,2013.

2. Ruquia Mirzll, Ayesha Tehseen, Joshi Kumar A. V, “An Indoor Navigation Approach to Aid the Physically Disabled People”, Interntional Conference on Computing, Electronics and Electrical Technologies [ICCEET],pp- 978-1-4673-0210-4,2011,IEEE

3. Rajesh Kannan Megalingam, Ramesh Nammily Nair, Sai Manoj Prakhya ,” Automated Voice based Home Navigation System for the Elderly and the Physically Challenged”, pp-978-1-4577-0787-2,2011,IEEE.

4. F. J. Villanueva, M.A. Martínez, D. Villa, C. Gonzalez and J.C. López,” Elcano: Multimodal Indoor Navigation Infrastructure for Disabled People”, IEEE International Conference on Consumer Electronics (ICCE),2011, pp978-1-4244-8712-7,IEEE 2011.

5. RuÅŸen Öktem, Elif Aydın, Nergiz Ercil Çağıltay” , An Indoor Navigation Aid Designed for Visually Impaired People”, pp-978-1-4244-1766-6, IEEE 2011.

6. Farrah Wong; R. Nagarajan*; Sazali Yaacob,” Applicationof Stereovision in a Navigation Aid for Blind People”,ICICS-PCM, 200315-18DeCembaZOO3 Singapore.pp- 0-7803-8185-8,IEEE 2003.

7. M. Mokhtari ,B.Abdulrazakl, R. Rodriguez,B. Grandjean, “Implementation of a path planner to improve the usability of a robot dedicated to severely disabled people”, Proceedings o f t b e 2003 IEEE, International Conference on Robotics &Automation, Taipei, Taiwan, Seplember 14-19. 2003,pp- 0-7803- 7736-2,IEEE 2003.

8. Yann Morbre, Alain Pruski and Abed Chaib Malti, “Aided navigation for disabled people: Route recognition”, 2002 IEEE SMC TA2J2.

9. Philippe HOPPENOT, Etienne COLLE., “Human-like behavior robot - Application to disabled people assistance”,pp- 0-7803-6583,IEEE 2000.

10. Manoj Badoni and Sunil Semwal , “Discrete Distance and Water Pit Indicator using AVR ATmega8 in Electronic Travel Aid for Blind”, International Journal of Disaster Recovery and Business Continuity Vol. 2, November, 2011. 10. Olakanmi O. Oladayo, “A Multidimensional Walking Aid for Visually Impaired Using Ultrasonic Sensors Network with Voice Guidance”, I.J. Intelligent Systems and Applications, 2014, 08, 53-59 Published Online July 2014 in MECS (http://www.mecs-press.org/) DOI: 10.5815/ijisa.2014.08.06