@article{10_4064_sm_130_3_263_274,
     author = {Yuhua Lin},
     title = {Time-dependent perturbation theory for abstract evolution equations of second order},
     journal = {Studia Mathematica},
     pages = {263--274},
     year = {1998},
     volume = {130},
     number = {3},
     doi = {10.4064/sm-130-3-263-274},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-130-3-263-274/}
}