LeDoux (2014)

LeDoux (2015)

LeDoux et al (2018)

Olsson, Phelps (2004)

Panksepp (1998)

Panksepp (2005)

Panksepp (2011)

Papez (1937)

Plutchik (1980)

Feinstein et al (2013)

Hess (1962)

Hoppenbrouwers et al (2016)

Izard (1971)

Izard (1990)

James (1884)

LeDoux, Pine (2016)

MacLean (1949)

MacLean (1952)

MacLean (1970)

MacLean (1990)