Garcia-Aguilar N, Martinez-Palacios CA & Ross L (1999) Controlled anaesthesia of Rana catesbeiana (Shaw) and Rana pipiens (Schreber 1792) using xylocaine delivered by spray. Aquaculture Research, 30 (4), pp. 309-311. https://doi.org/10.1046/j.1365-2109.1999.00328.x
First paragraph: Frog culture is an expanding industry in many parts of the world, and research on the culture of these animals has increased in recent years. This has inevitably led to a need for convenient handling and sedatio, sufficient to enable various procedures to be carried out humanely.
Aquaculture Research: Volume 30, Issue 4