from CaltechAUTHORS

• Walker, R. C.; Benson, J. M.; et el. (1984) Observations of Superluminal Motions in 3C 120; ISBN 9789027717399; 121-124; 10.1017/S0074180900077834
• Pearson, T. J.; Unwin, S. C.; et el. (1982) Superluminal Expansion of 3C 273; ISBN 9789027713841; 355-356; 10.1017/S0074180900028126