1. See Hubert Rotthleuthner's characterisation of formal doctrine, 'Three legal Sociologies: Eugen Ehrlich, Hugo Sinzheimer, Max Weber', (1988)European Yearbook of Sociology in Law227-259.
2. Kirchhof representing the German Constitutional Court; Zuleeg, the European Court of Justice.
3. Transcendental Nonsense and the Functional Approach
4. See, for excellent discussion of this problem, A. T. Kronman,Max Weber(Edward Arnold, 1983).