1. Relating position uncertainty to maximum conjunction probability;Alfano,2003
2. Determining probability upper bounds for NEO close approaches;Alfano,2004
3. Review of conjunction probability methods for short-term encounters;Alfano,2007
4. Determining a probability-based distance threshold for conjunction screening;Alfano;J. Spacecraft Rockets,2014
5. Probability of collision error analysis;Alfriend;Space Debris,1999