@article{GDZPPN002226634,
title = {Kolmogorov Diameters in Solution Spaces of Systems of Partial Differential Equations.},
journal = {Manuscripta mathematica},
volume = {53},
year = {1985},
pages = {35-64},
zbl = {0616.35010},
url = {http://dml.mathdoc.fr/item/GDZPPN002226634}
}
Langenbruch, Michael. Kolmogorov Diameters in Solution Spaces of Systems of Partial Differential Equations.. Manuscripta mathematica, Tome 53 (1985) pp. 35-64. http://gdmltest.u-ga.fr/item/GDZPPN002226634/