Mason, C. (1997). The Significance of PCBs in Otters at National and Regional Scale. IUCN Otter Spec. Group Bull. 14 (1): 3 - 12
PCB Otter Iron Pro from Rob's Store on Tindie
Chesapeake Bay Otter Alliance
Increasing Concentrations of Perfluoroalkyl Acids in Scandinavian Otters (Lutra lutra) between 1972 and 2011: A New Threat to the Otter Population? | Environmental Science & Technology
Mammals
Otter-Iron on Kitspace
Otter study shows PCB, pesticide exposure | Outdoors | daily-journal.com
Toble_Miner | tsys on Twitter: "Just finished building @JanHenrikH 's Otter-Iron, a PCB for converting the famous TS100 into a USB-C PD powered soldering iron. Will be absolutely awesome for soldering on
Sea otter 5 30-update1
Natural history
River otters (Lontra canadensis) “trapped” in a coastal environment contaminated with persistent organic pollutants: Demographic and physiological consequences - ScienceDirect
Wildlife Health Center / School of Veterinary Medicine - Sea Otter Project