sentence2: EBSCO database verified by URAC; accessed from Mount Sinai Hospital, New York WhoNamedIt.com: Max Wilms 아카데미서적 편집부 (2003년 3월 10일). 《아카데미 생명과학사전 2003》.
sentence1: EBSCO database verified by URAC; accessed from Mount Sinai Hospital, New York نسخة محفوظة 03 أغسطس 2016 على موقع واي باك مشين.