- ^ Bernstein 2006, p. 31.
- ^ a b Beckman 2000, p. 139.
- ^ Beckman 2000, p. 156.
- ^ Beckman 2000, p. 158.
- ^ Bernstein 2006, p. 11.
- ^ Beckman 2000.
- ^ Evans 2010.
- ^ a b Beckman 2000, p. 157.
- ^ Bernstein 2006, p. 196-197.
- ^ a b Bernstein 2006, p. 195.
- ^ a b Bernstein 2006, p. 197.
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