- Algeria
- Omodeo et al., 2003
- Bulgaria
- Zicsi and Csuzdi, 1986b
- Canada
- Reynolds, 1995; British Columbia: Reynolds, 1995; Ontario: Reynolds, 1977; Quebec: Reynolds, 1975d, 1975e, 1976c; Lesage and Swert, 1978; Reynolds and Reynolds, 1992
- Denmark
- Blakemore, 2007
- Estonia
- Ivask et al., 2012
- Finland
- Blakemore, 2007
- France
- Bouche, 1972
- Iceland
- Gudleifsson and bjarnadottir, 2003; Blakemore, 2007b
- Norway
- Haraldsen et al., 1994; Sveistrup et al., 1997; Bakken et al., 2006; Blakemore, 2007; Pommeresche et al., 2009b.
- Russia
- Perel, 1979; Perel-Vsevolodova, 1997; Blakemore, 2007c
- Sweden
- Blakemore, 2007
- Ukraine
- Garbar and Vlasenko, 2007.
- United Kingdom
- Sims and Gerard, 1999; Scotland: Carpenter, 2011
- United States
- Reynolds, 1995; Alabama: Reynolds, 1995; California: Reynolds, 1995
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Data are not exhaustive. The database is permanently a work in progress.