TY - `JOUR` AU - Polag, Daniela AU - Keppler, Frank TI - Long-term monitoring of breath methane LA - eng SP - 9 S. T2 - The science of the total environment PY - 2018 VL - 624 SP - 69-77 DO - 10.1016/j.scitotenv.2017.12.097 AN - UBHD-68248955 ER -