1. The Friberg Spermagglutination Test-A modification;Franken;andrologia,1979
2. Reproductive Immunology. I. The effect of different protein concentrations of seminal plasma on in vitro lymphocyte cultures;Franken;Andrologia,1981a
3. Reproductive Immunology. II. The inhibitory effect of human seminal plasma from normozoospermic men on in vitro Lymphocyte cultures;Franken;Andrologia,1981b
4. Reproductive Immunology: III. The effect of seminal plasma from oligozoospermic men on in vitro lymphocyte cultures;Franken;Andrologia,1981c
5. A simple and sensitive method for demonstrating Spermagglutination activity in serum from infertile men and women;Friberg;Acta. Obstet. Gynecol. Scand.,1974