@article{10_1007_s10492_009_0017_5,
     author = {Yan, Ningning},
     title = {Superconvergence analysis and a posteriori error estimation of a {Finite} {Element} {Method} for an optimal control problem governed by integral equations},
     journal = {Applications of Mathematics},
     pages = {267--283},
     publisher = {mathdoc},
     volume = {54},
     number = {3},
     year = {2009},
     doi = {10.1007/s10492-009-0017-5},
     mrnumber = {2530543},
     zbl = {1212.65256},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s10492-009-0017-5/}
}