@incollection{iiasa14047,
       booktitle = {International Symposium on Systems Optimization and Analysis},
           title = {On {\ensuremath{\epsilon}}-Subgradient Methods of Non-Differentiable Optimization},
         address = {Germany},
       publisher = {Springer Berlin Heidelberg},
            year = {1979},
           pages = {187--195},
             doi = {10.1007/978-3-662-39921-7\_18},
             url = {https://pure.iiasa.ac.at/id/eprint/14047/},
            isbn = {978-3-662-39921-7},
        abstract = {The theory of nondifferentiable optimization studies extremum problems of complex structure involving interactions of many subproblems, stochastic factors, multi-stage decisions and other difficulties.},
          author = {Nurminski, E. A.}
}