TY - JOUR T1 - Waves and null congruences in a draining bathtub JO - International Journal of Modern Physics D UR - http://eprints.whiterose.ac.uk/107653/ PY - 2016/08/01 AU - Dempsey D AU - Dolan SR ED - DO - DOI: 10.1142/S0218271816410042 VL - 25 Y2 - 2024/12/22 ER -