Triângulo de Penrose (Portuguese Wikipedia)

Analysis of information sources in references of the Wikipedia article "Triângulo de Penrose" in Portuguese language version.

refsWebsite

Global rank Portuguese rank

4^th place

8^th place

2^nd place

4^th place

doi.org

dx.doi.org

Penrose, L. S.; Penrose, R. (Fevereiro de 1958). «Impossible objects: a special type of visual illusion». British Journal of Psychology. 49 (1): 31–33. PMID 13536303. doi:10.1111/j.2044-8295.1958.tb00634.x

nih.gov

ncbi.nlm.nih.gov

Penrose, L. S.; Penrose, R. (Fevereiro de 1958). «Impossible objects: a special type of visual illusion». British Journal of Psychology. 49 (1): 31–33. PMID 13536303. doi:10.1111/j.2044-8295.1958.tb00634.x