Светлый фон
{34} Rossi, Ades 2008.
{34}{35} Pilley, Reid 2011.
{35}{36} Herman 1986; Herman et al. 2001.
{36}{37} Schusterman, Krieger 1984; Schusterman, Gisiner 1988; Gisiner, Schusterman 1992.
{37}{38} Fundamental Neuroscience 2008: 642.
{38}{39} Pepperberg 1999/2002; Pepperberg 2012; Пепперберг 2017.
{39}{40} Pepperberg 2012: 114.
{40}{41} Зорина, Смирнова 2006: 159, 160, 259–261.
{41}{42} Линден 1981: 16, 17, 93, 143.
{42}{43} Miles 1990.
{43}