* {{Cite journal |last=Körner |first=Pjilipp |last2=Leuschel |first2=Michael |last3=Barbosa |first3=Joao |last4=Costa |first4=VÍTORVitor SANTOSSantos |last5=DAHLDahl |first5=VERÓNICAVeronica |last6=HERMENEGILDOHermengildo |first6=MANUELManuel V. |last7=MORALESMorales |first7=JOSEJose F. |last8=WIELEMAKERWielemaker |first8=JANJan |last9=DIAZDiaz |first9=DANIELDaniel |last10=ABREUAbreu |first10=SALVADORSalvador |last11=CIATTOCiatto |first11=GIOVANNIGiovanni |date=2022-05-17 |title=Fifty Years of Prolog and Beyond |url=http://dx.doi.org/10.1017/s1471068422000102 |journal=Theory and Practice of Logic Programming |volume=22 |issue=6 |pages=776–858 |doi=10.1017/s1471068422000102 |issn=1471-0684}}
{{Dual|source=Fifty Years of Prolog and Beyond|sourcepath=https://www.cambridge.org/core/journals/theory-and-practice-of-logic-programming/article/fifty-years-of-prolog-and-beyond/3A5329B6E3639879301A6D44346FD1DD|date=17 May 2022|author=
