@article{10_21136_MB_2002_133955,
     author = {Rach\r{u}nkov\'a, Irena and Tvrd\'y, Milan},
     title = {Localization of nonsmooth lower and upper functions for periodic boundary value problems},
     journal = {Mathematica Bohemica},
     pages = {531--545},
     publisher = {mathdoc},
     volume = {127},
     number = {4},
     year = {2002},
     doi = {10.21136/MB.2002.133955},
     mrnumber = {1942639},
     zbl = {1017.34013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.2002.133955/}
}