Division of signsPeirce, Charles S.; Pietarinen, Ahti-VeikkoSign systems studies = Töid märgisüsteemide alalt = Труды по знаковым системам2015 / p. 651-662 : ill https://doi.org/10.12697/SSS.2015.43.4.16 Journal metrics at Scopus Article at Scopus Article at WOS