2.
Czarny i in. 2016 – Czarny, R., Marcak, H., Nakata, N., Pilecki, Z. i Isakow, Z. 2016. Monitoring velocity changes caused by underground coal mining using seismic noise. Pure and Applied Geophysics Vol. 173, Issue 6, 1907–1916, DOI 10.1007/s00024-015-1234-3.