1. Bowditch N. The American Practical Navigator. Lighthouse Press; 2002.
2. Dutton's Nautical Navigation;Cutler,2003
3. Khan B. Indoor Navigation: Benefits and Use Cases; 2019. [Online]. Available: https://www.wrld3d.com/blog/indoor-navigation/.
4. Khan SA, Piprani ZA, Yu Z. Digital Technology and Circular Economy Practices: Future of Supply Chains, vol. 15; 2022.
5. Kosyanchuk V. The Evolution of Indoor Navigation Technologies; 2019. [Online]. Available: https://www.geoawesomeness.com/the-evolution-of-indoor-navigation-technologies/.