@article{article, title = {{The ionization mechanism of the extended gas in high redshift radio galaxies: Shocks or AGN photoionization?}}, url = {{}}, year = {{1997}}, month = {{1}}, author = {{Villar-Martín M and Tadhunter C and Clark N}}, volume = {{323}}, journal = {{Astronomy and Astrophysics}}, issue = {{1}}, pages = {{21-30}}, note = {{Accessed on 2024/10/23}}}