Thomas R. Hrabik, Jean V. Adams, Owen T. Gorman et al. 2007. Vertical Distribution of Fish Biomass in Lake Superior: Implications for Day Bottom Trawl Surveys. North American Journal of Fisheries Management 27:735-749.
I. J. Winfield, C. Onoufriou, M. J. O’Connell et al. 2007. Assessment in two shallow lakes of a hydroacoustic system for surveying aquatic macrophytes. Hydrobiologia 584:111-119.
Bin Zhu, Dean G. Fitzgerald,Susan B. Hoskins et al. 2007. Quantification of Historical Changes of Submerged Aquatic Vegetation Cover in Two Bays of Lake Ontario with Three Complementary Methods. Journal of Great Lakes Research 33:122–135.
Wanzenbock J , Mehner T, SchulzM, et al. 2003. Quality assurance of hydroacoustic surveys: the repeatability of fish - abundance and biomass estimates in lakes within and between hydroacoustic systems. Journal ofMarine Science 60 (3) : 486-492.
Bonacito Clizia, Ciriaco Saul, Costantini Marco et al. 2002. Sea-bed classification and sea-bottom mapping with GRASS in the Natural Marine Reserve of Miramare(Gulf of Trieste, Italy). Proceedings of the Open source GIS - GRASS users conference 2002.
John R. Skalski, Gary E. Johnson, Colleen M. Sullivan et al. 1996. Statistical evaluation of turbine bypass efficiency at Wells Dam on the Columbia River, Washington. Canadian Journal of Fisheries and Aquatic Sciences 53: 2188-2198.