- M. I. Gordion, V. I. Plotnikov, “Necessary optimality conditions in problems with constraints”, Radiophys Quantum Electron, 12, no. 11, 1969, 1264
- Zhaoxu Yu, Jacob Hammer, “Fastest recovery after feedback disruption”, International Journal of Control, 89, no. 10, 2016, 2121
- Ho-Lim Choi, Jacob Hammer, 2017 17th International Conference on Control, Automation and Systems (ICCAS), 2017, 933
- Lucien W. Neustadt, “An Abstract Variational Theory with Applications to a Broad Class of Optimization Problems. I. General Theory”, SIAM Journal on Control, 4, no. 3, 1966, 505
- Atle Seierstad, “On closedness under switching in banach space”, Math. Systems Theory, 3, no. 2, 1969, 97
- Sheng-Chao Huang, “Optimal control problems with retardations and restricted phase coordinates”, J Optim Theory Appl, 3, no. 5, 1969, 316
- C. Ursescu, “Adjacent and tangent regularity”, Optimization, 30, no. 2, 1994, 105
- Arthur Gittleman, “A general multiplier rule”, J Optim Theory Appl, 7, no. 1, 1971, 29
- R. Gabasov, F. M. Kirillova, “High Order Necessary Conditions for Optimality”, SIAM Journal on Control, 10, no. 1, 1972, 127
- P. C. Das, “Constrained optimization problems in Banach space”, J Optim Theory Appl, 17, no. 3-4, 1975, 279