Cabot, A., A. Jourani, L. Thibault, and D. Zagrodny. “The Attainment Set of the $\varphi$-Envelope and Genericity Properties”. Mathematica Scandinavica 124, no. 2 (June 17, 2019): 203–246. Accessed July 24, 2026. https://journals.msp.org/mscand/article/view/240.