Crystalline silicate dust around evolved stars - III. A correlations study of crystalline silicate featuresF. J. Molster, L. B. F. M. Waters, A. G. G. M. Tielens, C. Koike and H. ChiharaA&A, 382 1 (2002) 241-255DOI: https://doi.org/10.1051/0004-6361:20011552