@inProceedings{Lamichhane2018,
author = "BP Lamichhane
 and A Kumar
 and B Kalyanaraman",
title = "A mixed finite element method for elliptic optimal control problems using a three-field formulation",
series = "ANZIAM J.",
volume = "59",
pages = "C97--C111",
year = 2018,
booktitle = "Proceedings of the 13th Biennial Engineering Mathematics and Applications Conference, EMAC-2017",
editor = "Richard Clarke  and Alys Clark",
month = jul,
doi = "10.21914/anziamj.v59i0.12643",
note = "\url {http://journal.austms.org.au/ojs/index.php/ANZIAMJ/article/view/12643} [July 3, 2018]",
keywords = "Optimal control; biorthogonal system; a priori error estimates",
subjclass = "49J20, 65L20",
}