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Publications by R. C. P. van Helden
Unstable Spectrum of 10 Lacertae.
Astronomical Journal
Astrophysics
Astronomy
Planetary Science
Space
Related publications
Photoelectric Observations of SW Lacertae.
Astronomical Journal
Astrophysics
Astronomy
Planetary Science
Space
ROSAT Observations of Bright BL Lacertae Objects
Symposium - International Astronomical Union
Multi-Wavelength Observations of EV Lacertae
Symposium - International Astronomical Union
New Observations of BL Lacertae Objects
Symposium - International Astronomical Union
Multi-Band Intra-Night Optical Variability of BL Lacertae
Galaxies
Astrophysics
Astronomy
Energy Spectrum of the Primary Cosmic Rays in the Range 10 GeV–10 TeV
Exploring the Bulk of the BL Lacertae Object Population
Astronomy and Astrophysics
Astrophysics
Astronomy
Planetary Science
Space
Milliarcsecond Polarization Properties of Several BL Lacertae Objects
Symposium - International Astronomical Union
Photometric Monitoring of Three BL Lacertae Objects in 1993-1998
Astronomy and Astrophysics Supplement Series
