Home›Browse›cigarette smokers problem🌐EnglishEnglishDeutschFrançaisРусскийEntityQ1519501· pop 6· linked from 31 articlescigarette smokers problemSign in to saveconcurrency problem posed in 1971 by S. PatilWikidata factsInstance oftaskSources (1)wikidata.orgvia Wikidata · CC0Available in 6 languagesDeutschРусскийCzechSerbianSlovakvia Wikidata sitelinks · CC0