- Algeria
- Jamieson et al., 2002; Omodeo and Martinucci, 1987; Omodeo et al., 2003
- Austria
- Blakemore, 2008d
- Brazil
- Christoffersen, 2008
- Syn. Guarani camaqua: Rio Grande do Sul: Knapper and Porto, 1979; Brown and James, 2007; Lima and Rodriguez, 2007
- Bulgaria
- Valchovski, 2013
- France
- Graff, 1962
- Germany
- Blakemore, 2008d
- Greece
- Blakemore, 2008d
- Hungary
- Blakemore, 2008d
- Israel
- Omodeo, 1959; Pavlicek et al., 2003; Csuzdi and Pavlicek, 2005
- Italy
- Paoletti et al., 2013
- Latvia
- Blakemore, 2008d
- Lebanon
- Omodeo, 1959
- Moldova
- Blakemore, 2008d
- Poland
- Blakemore, 2008d
- Portugal
- Trigo et al., 1988
- Romania
- Pop, 2012.
- Russia
- Perel, 1979; Perel-Vsevolodova, 1997; Blakemore, 2007c
- Spain
- Diaz Cosin et al., 1992; Monroy et al., 2003
- Syria
- Omodeo, 1959
- Tunisia
- Boumaiza et al., 1986; Martinez-Ansemil and Giani, 1987; Omodeo and Martinucci, 1987
- Turkey
- Csuzdi et al., 2007
- United States
- Blakemore, 2008d, 2008g
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Data are not exhaustive. The database is permanently a work in progress.