@article{MS2_1972__30_166229,
     author = {Philip Brenner},
     title = {Initial {Value} {Problems} in {Lp} for {Systems} with {Variable} {Coefficients.}},
     journal = {Mathematica Scandinavica},
     pages = {141--149},
     publisher = {mathdoc},
     volume = {30},
     year = {1972},
     zbl = {0241.35066},
     url = {http://geodesic.mathdoc.fr/item/MS2_1972__30_166229/}
}