1. Evolution of the NAVSPACECOM catalog processing system using special perturbations;Schumacher,2000
2. Personal e-mail correspondence;Bowman,2014
3. Transitioning from a general perturbations to a special perturbations space object catalog;Wilkins,2000
4. Joint space Operations center space surveillance mission;McKissock,2016
5. Revisiting spacetrack report #3;Vallado,2006