TY - JOUR T1 - Detection of lubrication state in a field operational wind turbine gearbox bearing using ultrasonic reflectometry JO - Lubricants PY - 2021/01/06 AU - Nicholas G AU - Clarke BP AU - Dwyer-Joyce RS ED - DO - DOI: 10.3390/lubricants9010006 PB - MDPI AG VL - 9 IS - 1 Y2 - 2024/12/22 ER -