Garašić, Mladen, Meho Saša Kocačević, and Danijela Jurić-Kaćunić. 2010. “Investigation and Remediation of the Cavern in the Vrata Tunnel on the Zagreb – Rijeka Highway (Croatia)”. Acta Carsologica 39 (1). Ljubljana, Slovenija. https://doi.org/10.3986/ac.v39i1.113.