@article{11311_526740,<br>  author    = {Topputo, Francesco and A. H., Owis and BERNELLI ZAZZERA, Franco},<br>  title     = {Analytical Solution of Optimal Feedback Control for Radially Accelerated Orbits},<br>  year      = {2008},<br>  doi       = {10.2514/1.33720},<br>  journal   = {JOURNAL OF GUIDANCE CONTROL AND DYNAMICS},<br>  volume    = {31},<br>  number    = {5},<br>  pages     = {1352--1359},<br>}<br>