Rack, Heinz Joachim. “The Second Zolotarev Case in the Erdös-Szegö Solution to a Markov-Type Extremal Problem of Schur”. J. Numer. Anal. Approx. Theory 46, no. 1 (September 21, 2017): 54–77. Accessed May 5, 2024. https://ictp.acad.ro/jnaat/journal/article/view/1100.