Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) DUBOVICKII A. Ja.,Necessary conditions for a weak extremum in optimal control problems with mixed constraints of the inequality type,U. S. S. R. Comput. Math. and Math. Physw.,,,1968,9,,24-98,https://cir.nii.ac.jp/crid/1573668925367335040,