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Откупщиков, Ю. В. (1970) “К этимологии лит. káušas, лтш. kaûss „череп, ковш“ [On the etymology of Lithuanian káušas, Latvian kaûss "skull, scoop"]”, in Baltistica‎^[1] (in Russian), volume 6, number 2, →DOI, pages 185–192