Claeys, Philippe; Morbidelli, Alessandro. Late Heavy Bombardment // Gargaud, Muriel; Amils, Prof Ricardo; Quintanilla, José Cernicharo; Cleaves II, Henderson James (Jim); Irvine, William M.; Pinti, Prof Daniele L.; Viso, Michel (redaktorlar ). Encyclopedia of Astrobiology. Springer Berlin Heidelberg. 1 January 2011. 909–912. doi:10.1007/978-3-642-11274-4_869. ISBN978-3-642-11271-3.
Claeys, Philippe; Morbidelli, Alessandro. Late Heavy Bombardment // Gargaud, Muriel; Amils, Prof Ricardo; Quintanilla, José Cernicharo; Cleaves II, Henderson James (Jim); Irvine, William M.; Pinti, Prof Daniele L.; Viso, Michel (redaktorlar ). Encyclopedia of Astrobiology. Springer Berlin Heidelberg. 1 January 2011. 909–912. doi:10.1007/978-3-642-11274-4_869. ISBN978-3-642-11271-3.
Bowring, Samuel A.; Williams, Ian S. "Priscoan (4.00–4.03 Ga) orthogneisses from northwestern Canada". Contributions to Mineralogy and Petrology. 134 (1). 1999: 3. Bibcode:1999CoMP..134....3B. doi:10.1007/s004100050465.
Bowring, Samuel A.; Williams, Ian S. "Priscoan (4.00–4.03 Ga) orthogneisses from northwestern Canada". Contributions to Mineralogy and Petrology. 134 (1). 1999: 3. Bibcode:1999CoMP..134....3B. doi:10.1007/s004100050465.