<https://quba-viewer.org/p/quba-0-5-mit-pdf-und-factur-x-zugferd-support/?lang=en#article>
<http://schema.org/headline>
"Quba 0.5 with support for PDF and Factur-X/ZUGFeRD"
<https://quba-viewer.org/p/quba-0-5-mit-pdf-und-factur-x-zugferd-support/?lang=en>