@article{10_4064_ap_56_1_37_48,
     author = {Jerzy Ombach},
     title = {Saddles for expansive flows with the pseudo orbits tracing property},
     journal = {Annales Polonici Mathematici},
     pages = {37--48},
     publisher = {mathdoc},
     volume = {56},
     number = {1},
     year = {1991},
     doi = {10.4064/ap-56-1-37-48},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-56-1-37-48/}
}