Application of gamma densitometry and statistical signal analysis to gas phase velocity measurements in pipeline hydrotransportMarcin Zych, Robert Hanus, Leszek Petryka, Dariusz Świsulski, Anna Strzępowicz and Piotr ZychEPJ Web of Conferences, 92 (2015) 02122DOI: https://doi.org/10.1051/epjconf/20159202122