[[1] Dima, N. e.a., 2005 General topography and mining topography elements (in romanian), Universitas Publishing, Petroșani]Search in Google Scholar
[[2] Dima, N. e.a., 1999 Error theory and the smallest squares method (in romanian), Universitas Publishing, Petroșani]Search in Google Scholar
[[3] Dima, N. e.a., 1996 Mining topography (in romanian), Corvin Publishing, Deva]Search in Google Scholar