+}
+@article{Sanchez-2-2012,
+year={2012},
+issn={1939-8018},
+journal={Journal of Signal Processing Systems},
+volume={71},
+number={3},
+doi={10.1007/s11265-012-0715-1},
+title={Highly Parallelable Bidimensional Median Filter for Modern Parallel Programming Models},
+url={http://dx.doi.org/10.1007/s11265-012-0715-1},
+publisher={Springer US},
+keywords={Nonlinear filters; Parallel algorithms; Image processing},
+author={Sánchez, R. M. and Rodríguez, P. A.},
+pages={221-235},
+language={English}
+}
+
+@inproceedings{Batcher:1968:SNA:1468075.1468121,
+ author = {Batcher, K. E.},
+ title = {Sorting networks and their applications},
+ booktitle = {Proceedings of the April 30--May 2, 1968, Spring Joint Computer Conference},
+ series = {AFIPS '68 (Spring)},
+ year = {1968},
+ location = {Atlantic City, New Jersey},
+ pages = {307--314},
+ numpages = {8},
+ url = {http://doi.acm.org/10.1145/1468075.1468121},
+ doi = {10.1145/1468075.1468121},
+ acmid = {1468121},
+ publisher = {ACM},
+ address = {New York, NY, USA},
+}
+@book{cormen2001introduction,
+ title={Introduction to algorithms},
+ author={Cormen, Thomas H and Leiserson, Charles E and Rivest, Ronald L and Stein, Clifford},
+ year={2001},
+ publisher={MIT press}
+}
+@article{median_zul,
+year={2013},
+issn={1939-8018},
+journal={Journal of Signal Processing Systems},
+doi={10.1007/s11265-013-0799-2},
+title={Fine-tuned High-speed Implementation of a GPU-based Median Filter},
+url={http://dx.doi.org/10.1007/s11265-013-0799-2},
+publisher={Springer US},
+keywords={Median; Filter; GPU},
+author={Perrot, G. and Domas, S. and Couturier, R.},
+pages={1-6},
+language={English}