3966 20190128164539.0 10.3390/galaxies7010006 DOI SCART-2019-0093 Hajduk, Marcin Radio Continuum Spectra of Planetary Nebulae 2018 NO van Hoof, Peter Sniadkowska, Karolina Krankowski, Andrzej Błaszkiewicz, Leszek Dabrowski, Bartosz Zijlstra, Albert Galaxies 7 2018 1 6 peter.vanhoof@observatoire.be https://ui.adsabs.harvard.edu/\#abs/2018Galax...7....6H published in REFERD