@article{10_4064_ap_38_2_121_131,
     author = {J. Grochulski and T. Konik and M. Tkacz},
     title = {On the tangency of sets in metric spaces},
     journal = {Annales Polonici Mathematici},
     pages = {121--131},
     publisher = {mathdoc},
     volume = {38},
     number = {2},
     year = {1980},
     doi = {10.4064/ap-38-2-121-131},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-38-2-121-131/}
}