Classificação de Petrov (Portuguese Wikipedia)

Analysis of information sources in references of the Wikipedia article "Classificação de Petrov" in Portuguese language version.

refsWebsite

Global rank Portuguese rank

622^nd place

10^th place

1encyclopediaofmath.org

3,863^rd place

6,060^th place

encyclopediaofmath.org

Petrov classification - www.encyclopediaofmath.org

google.com.br

books.google.com.br

Ghanashyam Date; General Relativity: Basics and Beyond; CRC Press, 2014. pg 234.