+@article{refCGNR,
+year={2001},
+journal={Annals of Operations Research},
+volume={103},
+number={1-4},
+title={An {A}daptive {CGNR} {A}lgorithm for {S}olving {L}arge {L}inear {S}ystems},
+publisher={Kluwer Academic Publishers},
+author={Li, Chunguang},
+pages={329-338},
+}
+
+@article{ref34,
+title = {{GMRES}: {A} {G}eneralized {M}inimal {R}esidual {A}lgorithm for {S}olving {N}onsymmetric {L}inear {S}ystems},
+author = {Saad, Y. and Schultz, M. H.},
+journal = {SIAM Journal on Scientific and Statistical Computing},
+volume = {7},
+number = {3},
+pages = {856--869},
+year = {1986},
+}
+
