@article{SF_1989__39_2_134976,
     author = {R. de Laubenfels},
     title = {Second order incomplete expiring {Cauchy} problems.},
     journal = {Semigroup forum},
     pages = {75--84},
     publisher = {mathdoc},
     volume = {39},
     number = {2},
     year = {1989},
     url = {http://geodesic.mathdoc.fr/item/SF_1989__39_2_134976/}
}