@article{10_21136_MB_2011_141700,
     author = {Chiralt, Cristina and Campos, Beatriz and Vindel, Pura},
     title = {Bifurcations in the two imaginary centers problem},
     journal = {Mathematica Bohemica},
     pages = {405--414},
     publisher = {mathdoc},
     volume = {136},
     number = {4},
     year = {2011},
     doi = {10.21136/MB.2011.141700},
     mrnumber = {2985550},
     zbl = {1249.37031},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.2011.141700/}
}