EkmanP.FriesenW. V.The repertoire of nonverbal behavior: Categories, origins, usage, and coding. Semiotica, 1969, 1, 49–98.
2.
KraussR. M.AppleW.MorencyN.WenzelC.WintonW.Verbal, vocal, and visible factors in judgments of another's affect. Journal of Personality and Social Psychology, 1981, 40, 312–320.
