Hildebrand, A. R., Pilkington, M., Halpenny, J., Cooper, R., Connors, M., Ortiz Aleman, C., Chavez, R.E., Urrutia Fucugauchi, J., Graniel Castro, E., Camara Zi, A., & Buffler, R.T. (1997). The Chicxulub Crater as Revealed by Gravity and Seismic Surveys.78, F398.