@article{10_4153_CJM_1985_064_9,
     author = {Marshall, Bernard},
     title = {Estimates for {Solutions} of {Wave} {Equations} with {Vanishing} {Curvature}},
     journal = {Canadian journal of mathematics},
     pages = {1176--1200},
     year = {1985},
     volume = {37},
     number = {6},
     doi = {10.4153/CJM-1985-064-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1985-064-9/}
}