Teodoru, Georgeta. “An Application of the Fixed Point Theorem of Bohnenblust-Karlin to the Darboux Problem for a Multivalued Inclusion”. Rev. Anal. Numér. Théor. Approx. 29, no. 2 (August 1, 2000): 213–219. Accessed March 28, 2024. https://ictp.acad.ro/jnaat/journal/article/view/2000-vol29-no2-art12.