Analysis of information sources in references of the Wikipedia article "Conclave de 1958" in Portuguese language version.
|url-access=registration (ajuda)Twice during the day the famous chimney ... emitted dense black smoke.... Both signals gave the impression at first that a Pope had been elected.... The smoke that appeared shortly before noon appeared white at first and came in a thin stream.... A few minutes later, however, the smoke signal was repeated and this time it was unmistakably black.