@conference{
11311_1027046,
author = {Gonzalo Gomez, J. L. and Bombardelli, C. and Topputo, F.},
title = {Unified Formulation for Element-Based Indirect Trajectory Optimization},
year = {2017},
booktitle = {26th International Symposium on Space Flight Dynamics},
url = {http://issfd.org/ISSFD_2017/paper/ISTS-2017-d-116__ISSFD-2017-116.pdf},
pages = {1--6}
}