@article{10_4064_sm155_2_7,
     author = {F. Periago and B. Straub},
     title = {On the existence and uniqueness of solutions for an
 incomplete second-order abstract {Cauchy} problem},
     journal = {Studia Mathematica},
     pages = {183--193},
     publisher = {mathdoc},
     volume = {155},
     number = {2},
     year = {2003},
     doi = {10.4064/sm155-2-7},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm155-2-7/}
}