@article{JMAG_1998_5_a2,
     author = {Max Jodeit and Jr. and B. M. Levitan},
     title = {A characterization of some even vector-valued {Sturm--Liouville} problems},
     journal = {\v{Z}urnal matemati\v{c}eskoj fiziki, analiza, geometrii},
     pages = {166--181},
     publisher = {mathdoc},
     volume = {5},
     year = {1998},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JMAG_1998_5_a2/}
}