@article{10_21136_CPM_1976_117923,
     author = {Pt\'ak, Vlastimil},
     title = {Isometric parts of operators and the critical exponent},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {383--388},
     publisher = {mathdoc},
     volume = {101},
     number = {4},
     year = {1976},
     doi = {10.21136/CPM.1976.117923},
     mrnumber = {0458214},
     zbl = {0351.47006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1976.117923/}
}