1. Adlhart, W., Frey, F., Jagodzinski, H. (1980a) X-ray and neutron investigations of the Pl̄ – Il̄ transition in pure anorthite. Acta Cryst. A36, 450–460.
2. Adlhart, W., Frey, F., Jagodzinski, H. (1980b) X-ray and neutron investigations of the Pl̄ – I l̄ transition in anorthite with low albite content. Acta Cryst. A36, 461–470.
3. Aizu, K. (1970) Determination of the state parameters and formulation of spontaneous strain for ferroelastics. J. Phys. Soc. Japan 28, 706–716.
4. Als-Nielsen, J., Birgeneau, R. J. (1977) Mean field theory, the Ginzburg criterion, and marginal dimensionality of phase transitions. Am. J. Phys. 45, 554–560.
5. Bambauer, H. U., Bernotat, W. H. (1982) The microcline/sanidine transformation isograd in metamorphic regions. I. Composition and structural state of alkali feldspars from granitoid rocks of two N - S traverses across the Aar Massif and Gotthard <>, Swiss Alps. Schweiz. Min. Pet. 62, 185–230.