Šámal M., Kárný Miroslav, Sůrová H., Dienstbier Z. :  Theoretical and Experimental Basis of the Clinical Use of Factor Analysis , Radioactive Isotopes in Clinical Medicine and Research, p. 200-203 , Eds: Höfer R., Bergmann H., Sinzinger M., Schattauer, (Stuttgart 1991) , International Symposium on Radioactive Isotopes in Clinical Medicine and Research /19./, (Badgastein, AT, 09.01.1990-12.01.1990) [1991]