@article{10_4064_am_18_4_635_643,
     author = {J. Ombach},
     title = {Periodic points and bifurcation of one-dimensional maps},
     journal = {Applicationes Mathematicae},
     pages = {635--643},
     publisher = {mathdoc},
     volume = {18},
     number = {4},
     year = {1983},
     doi = {10.4064/am-18-4-635-643},
     zbl = {0634.58007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/am-18-4-635-643/}
}