@article{oai:ynu.repo.nii.ac.jp:00006598, author = {Eisenfeld, J. and Lakshmikantham, V.}, journal = {Yokohama Mathematical Journal = 横濱市立大學紀要. D部門, 数学}, month = {}, note = {application/pdf}, pages = {133--140}, title = {ON A MEASURE OF NONCONVEXITY AND APPLICATIONS}, volume = {24}, year = {1976} }