A. L. Melendez-Lopez, S. . Ramos-Bernal, and A. Negron-Mendoza, “Stability of Aspartic Acid at 77°K under Gamma Radiation in a Comet Cores Simulation: Implications for Chemical Evolution Studies ”, J. Nucl. Phy. Mat. Sci. Rad. A., vol. 4, no. 1, pp. 191–201, Aug. 2016.