Mikoláš, M., Žváček, J., Vaněk, M., Donocik, R., Zápalková, P., & Sotorník, V. (2011). Testing the effect of undermining on positional accuracy of the digital technical map of Ostrava in the Přívoz cadastral district. Geodesy and Cartography, 37(3), 111-118. https://doi.org/10.3846/13921541.2011.626251