@article{MM2_1985__53_155088,
     author = {Michael Langenbruch},
     title = {Kolmogorov {Diameters} in {Solution} {Spaces} of {Systems} of {Partial} {Differential} {Equations.}},
     journal = {Manuscripta mathematica},
     pages = {35--64},
     publisher = {mathdoc},
     volume = {53},
     year = {1985},
     zbl = {0616.35010},
     url = {http://geodesic.mathdoc.fr/item/MM2_1985__53_155088/}
}