608
Hatton 2014.
609
Dalgaard and Strulik 2016.
610
Danaei et al. 2016.
611
Hadhazy 2015.
612
См.: Berg et al. 1992; Guevara-Aguirre et al. 2011; Taubes 2013; Rosenbloom et al. 1990.
613
Bergland 1965.
614
Greenfieldboyce 2017.
615
В газете
616
Keith 1911.
617
Landolt and Zachmann, 1980.