Sūdžiūtė, D. “The Shapes of the Spectra of the Equilibrium Strategies for Some Non-Zero Two-Person Games on the Unity Square”. Lithuanian Mathematical Journal 9, no. 3 (September 15, 1969): 687–694. Accessed May 4, 2025. https://www.zurnalai.vu.lt/LMJ/article/view/20810.