共 50 条
- [44] Necessary and sufficient conditions for the optimal number of firms Journal of Economics, 2009, 98 : 235 - 246
- [45] NECESSARY AND SUFFICIENT CONDITIONS FOR PROBLEM OF OPTIMAL CONTROL DOKLADY AKADEMII NAUK SSSR, 1973, 211 (01): : 59 - 62
- [47] Necessary and sufficient conditions for oscillation of fourth order dynamic equations on time scales Advances in Difference Equations, 2019
- [50] Sufficient and necessary conditions for oscillation of linear fractional-order delay differential equations Advances in Difference Equations, 2021