Vandyck, MAJ. (1984). On Some Time-dependent Axially-symmetric Metrics Generalizing the Weyl and the Einstein-rosen Line-elements. Societe Scientifique de Bruxelles. Annales. Sciences Mathematiques, Astronomiques et Physiques, 98(2-3), 97-121. https://hdl.handle.net/2078.5/82545 (Original work published 1984)