1. Nobody’s Fool. Spoofing Detection in a High-Precision Receiver» Inside GNSS, July/August 2020
2. INFORMATION THREATS TO THE GLOBAL NAVIGATION SATELLITE SYSTEM AND HOW TO ELIMINATE THEM Sciences of Europe # 35, (2019)

3. https://content.u-blox.com/sites/default/files/NEO-M9N_Integrationmanual_UBX-19014286.pdf