1. Review of unmanned aircraft system (UAS);Gupta S. G.;Int. J. Adv. Res. Comp. Eng. Technol. (IJARCET),2013
2. Sense and avoid technologies with applications to unmanned aircraft systems: Review and prospects
3. FAA Introduction to TCAS II Version 7.1 2011. Available from:https://www.faa.gov/documentLibrary/media/Advisory_Circular/TCAS%20II%20V7.1%20Intro%20booklet.pdf
4. Detect and Avoid for Small Unmanned Aircraft Systems Using ADS-B
5. M. C.Consiglio J. P.Chamberlain C. A.Munoz andK. D.Hoffler Concepts of integration for UAS operations in the NAS 2012. Available from:https://ntrs.nasa.gov/search.jsp?R=20120015770