P. F. Younger

The ASTRA Spectrophotometer: Design and Overview

Louis J. Boyd, Donald H. Epand, Saul J. Adelman, 2007 .

The ASTRA spectrophotometer:. July 2005 progress report

B. Smalley, P. F. Younger, S. J. Adelman, 2004 .

The Open Cluster Ruprecht 91 and Its Cepheids

P. F. Younger, D. Turner, L. Berdnikov, 2005 .

A Search for OB Associations near Southern Long-Period Cepheids. IV. XY Carinae, GT Carinae, WZ Sagittarii, and SW Velorum

P. F. Younger, S. Bergh, D. Turner, 1993 .

A search for OB associations near southern long-period Cepheids. II: CT Carinae, UU Muscae, VZ Puppis, SV Velorum, and EZ Velorum

P. F. Younger, S. Bergh, G. Alcaíno, 1983 .

Steps toward determination of the size and structure of the broad-line region in active nuclei. 7: Variability of the optical spectrum of NGC 5548 over years

P. F. Younger, L. Ho, M. Mignoli, 1994 .