Ekuador: Paggiddiatan a nagbaetan dagiti rebision

* {{citeCite journal |last=Moritz |first=H. |date=1980 |title=Geodetic Reference System 1980 |journal=Bulletin Géodésique |publisher=Springer-Verlag |location=[[Berlin]] |first=H |last=Moritz |pages=395–405 |volume=54 |issue=3 |datepages=Septiembre 1980395–405 |doi=10.1007/BF02521480|bibcode = 1980BGeod..54..395M |doi=10.1007/BF02521480}} (IUGG/WGS-84 data)

* {{citeCite book |last=Taff |first=Laurence G. |title=Computational Spherical Astronomy |date=1981 |publisher=Wiley |isbn=0-471-06257-X |location=[[Siudad ti New York|New York]] |first=Laurence G |last=Taff |year=1981 |isbn=0-471-06257-X |oclc=6532537}} (IAU data)