Fizyk niemiecki.

LCC online

Kp. Trends in applications of pure mathematics to mechanics / ed. by E. Kröner and K. Kirchgässner. - Berlin, 1986. (Inst. für Theoretische und Angewandte Physik, Univ. Stuttgart)

a Structured media : in memory of Professor Ekkehart Kröner : proceedings of the international symposium TRECOP'01, Poznań, Poland, September 16-21, 2001 / ed. Bogdan T. Maruszewski. - Poznań, 2002

DNB online