Ellen Allen, Richard V. Helgason, Jeffery L. Kennington, Bala Shetty. A generalization of Polyak's convergence result for subgradient optimization. Math. Program., 37(3):309-317, 1987. [doi]
@article{AllenHKS87,
title = {A generalization of Polyak's convergence result for subgradient optimization},
author = {Ellen Allen and Richard V. Helgason and Jeffery L. Kennington and Bala Shetty},
year = {1987},
doi = {10.1007/BF02591740},
url = {http://dx.doi.org/10.1007/BF02591740},
researchr = {https://researchr.org/publication/AllenHKS87},
cites = {0},
citedby = {0},
journal = {Math. Program.},
volume = {37},
number = {3},
pages = {309-317},
}