Ernst Öpik (Estonian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Ernst Öpik" in Estonian language version.

refsWebsite

Global rank Estonian rank

18^th place

77^th place

2^nd place

16^th place

doi.org

Öpik, Ernst (1916). "The Densities of Visual Binary Stars". ApJ. 44: 292–302. DOI:10.1086/142296.
Öpik, Ernst (1922). "An estimate of the distance of the Andromeda Nebula". ApJ. 55: 406–410. DOI:10.1086/142680.

harvard.edu

adsabs.harvard.edu

Öpik, Ernst (1916). "The Densities of Visual Binary Stars". ApJ. 44: 292–302. DOI:10.1086/142296.
Öpik, Ernst (1922). "An estimate of the distance of the Andromeda Nebula". ApJ. 55: 406–410. DOI:10.1086/142680.