Ultrasonics - Hydrophones - Part 1: Measurement and characterization of medical ultrasonic fields up to 40 MHz (IEC 62127-1:2007 + Cor.:2008 + A1:2013) (english version)
Uncertainty of measurement -- Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) -- Supplement 1: Propagation of distributions using a Monte Carlo method— 98 стр.
Ultrasonics - Hydrophones - Part 3: Properties of hydrophones for ultrasonic fields up to 40 MHz (IEC 62127-3:2007); German version EN 62127-3:2007— 23 стр.