Laboratory study of bilateral supernova remnants and continuous MHD shocks by Mabey, P, Albertazzi, B, Rigon, G, Marques, J-R, Palmer, CAJ, Topp-Mugglestone, J, Perez-Martin, P, Kroll, F, Brack, F-E, Cowan, TE, Schramm, U, Falk, K, Gregori, G, Falize, E, Koenig, M