@article{TM_1998_220_a14,
     author = {G. L. Kharatishvili and T. A. Tadumadze},
     title = {A~nonlinear optimal control problem with variable delay, nonfixed initial moment, and piecewise-continuous prehistor},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {236--255},
     publisher = {mathdoc},
     volume = {220},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1998_220_a14/}
}