BRANTLEY R, HENDERSON J. SOME ANALOGUES OF A THEOREM OF PEANO FOR BOUNDARY VALUE PROBLEM. Tamkang J. Math. [Internet]. 1991 Mar. 1 [cited 2024 Apr. 26];22(1):83-98. Available from: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4577