1. Stollenwerk U. Synthese von Thymosina1., einem Polypeptid des Thymus. Angew. Chem. 1979. P. 422–423;Chr;Angew Chem Int Ed Engl,1979
2. 2. Birr Chr., Ciardelli T. L., Brodner O and Incefy, G. S.: Small Peptides of Thymic Origin Stimulate T-Lymphocytes Subsets. Peptides (V. Hruby and D. Rich, Eds.), Pierce Chem. Comp., Rockford, USA (1983),885–888.
3. 3. Birr Chr.: Synthetic Small Thymic Peptides, an Immunregulatory Concept. Thymic Hormones & Lymphokines 1983 (A. L. Goldstein, Ed.), Plenum Publ. Corp., Washington, D.C. (1984), 97–109.
4. Bohn B. and Jaeger K.-H.: Biochemical Characterization and Immunomodulatory Action of Thymic Components as Determined by Flow Cytometry on Human Lymphocytes.;Chr;Thymus,1987
5. 5. Birr Chr., Nebe Th. and Becker G.: Site specific differentiation induction on T cells in vivo by synthetic thymic peptides to fight microbial infections and cancer. Immunotherapy of Infections (K. N. Masishi, Ed.), Marcel Dekker, 1994.