@article{10_1007_s10492_007_0008_3,
     author = {Vit\'asek, Emil},
     title = {Approximate solutions of abstract differential equations},
     journal = {Applications of Mathematics},
     pages = {171--183},
     publisher = {mathdoc},
     volume = {52},
     number = {2},
     year = {2007},
     doi = {10.1007/s10492-007-0008-3},
     mrnumber = {2305871},
     zbl = {1164.34457},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s10492-007-0008-3/}
}