@article{10_4064_ap_58_3_253_258,
     author = {Jerzy Ombach},
     title = {The simplest shadowing},
     journal = {Annales Polonici Mathematici},
     pages = {253--258},
     publisher = {mathdoc},
     volume = {58},
     number = {3},
     year = {1993},
     doi = {10.4064/ap-58-3-253-258},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-58-3-253-258/}
}