4623 2012 eng 5 53 article 0 -- -- -- Conservation laws and symmetries of quasilinear radial wave equations in multi-dimensions Journal of Mathematical Physics 10.1063/1.4711814 yes urn:nbn:de:0297-zib-16111 Stephen Anco Engel Steven A. MacNaughton Thomas Wolf Digital Data and Information for Society, Science, and Culture