Robert Marcus; H. Jay Melosh & Gareth Collins (2010). "Earth Impact Effects ProgramArchived 2010-03-10 at the वेबैक मशीन". Imperial College London / Purdue University. Retrieved 2013-02-04. (solution using 2600kg/m^3, 17km/s, 45 degrees)
nasa.gov
neo.jpl.nasa.gov
"NEO GroupsArchived 2013-02-02 at the वेबैक मशीन". NASA/JPL Near-Earth Object Program Office. Retrieved 2012-06-04.
passc.net
"ChicxulubArchived 2010-11-15 at the वेबैक मशीन". Earth Impact Database. University of New Brunswick. Retrieved 2008-12-30.
Robert Marcus; H. Jay Melosh & Gareth Collins (2010). "Earth Impact Effects ProgramArchived 2010-03-10 at the वेबैक मशीन". Imperial College London / Purdue University. Retrieved 2013-02-04. (solution using 2600kg/m^3, 17km/s, 45 degrees)
"ChicxulubArchived 2010-11-15 at the वेबैक मशीन". Earth Impact Database. University of New Brunswick. Retrieved 2008-12-30.