BibTex format
@article{POLAK:1975:10.1007/BF01262938,
author = {POLAK, E and MAYNE, DQ},
doi = {10.1007/BF01262938},
journal = {JOURNAL OF OPTIMIZATION THEORY AND APPLICATIONS},
pages = {303--325},
title = {FIRST-ORDER STRONG VARIATION ALGORITHMS FOR OPTIMAL CONTROL PROBLEMS WITH TERMINAL INEQUALITY CONSTRAINTS},
url = {http://dx.doi.org/10.1007/BF01262938},
volume = {16},
year = {1975}
}