[403:TFABBT2.0.CO;2 The Four Awards Bestowed by The Academy of Natural Sciences and Their Recipients], in Proceedings of the Academy of Natural Sciences of Philadelphia, vol. 156, n. 1, The Academy of Natural Sciences of Philadelphia, giugno 2007, pp. 403-404, DOI:10.1635/0097-3157(2007)156[403:TFABBT]2.0.CO;2. URL consultato il 2 aprile 2016.
oadoi.org
[403:TFABBT2.0.CO;2 The Four Awards Bestowed by The Academy of Natural Sciences and Their Recipients], in Proceedings of the Academy of Natural Sciences of Philadelphia, vol. 156, n. 1, The Academy of Natural Sciences of Philadelphia, giugno 2007, pp. 403-404, DOI:10.1635/0097-3157(2007)156[403:TFABBT]2.0.CO;2. URL consultato il 2 aprile 2016.