28: 253–287. doi:10.1090/s0273-0979-1993-00389-6. ↑ List of Fellows of the American Mathematical Society, retrieved 2012-11-10. ↑ "American Mathematical Society - The Joan and Joseph Birman Fellowship for Women Scholars". www.ams.org. Retrieved 2018-04-02. ↑ Magnus, W. (1976).