"Sirpoc -- the creator of the 'Norwegian Singles Method'" - The Physiology of Endurance Running podcast episode interviewing Sirpoc84 (Apple Podcasts, Spotify)
"The Norwegian single approach" - an executive summary of the training method - https://docs.google.com/document/d/1OUk4lHlMzLkYzJAhlJAeaoj9OQNJH6g7uS31fl1To4Q/edit?tab=t.0
"The Norwegian Method for Amateur Runners" - The Running Shorts Podcast (Apple Podcasts, Spotify)
"Kristoffer Ingebrigtsen's Norwegian Single Threshold training approach" - translation of a Norwegian podcast by Dr. John Davis of RunningWritings.com - https://runningwritings.com/2025/07/kristoffer-ingebrigtsen-norwegian-single-threshold-training.html
Norwegian Singles Approach - Strava group - https://www.strava.com/clubs/1175805
"Lactate and Heart Rate in the Heat and Humidity" - from forum poster Hard2Find - https://docs.google.com/document/d/1dPm4smu8PJnzZoQrAzBLBn5ohh0TjTbsX8KiMWK6Njk/edit?tab=t.0
Training Calculator - calculate reps, times, paces here - https://docs.google.com/spreadsheets/d/1Ah9qBF5zBvXh0-eWefJKUQUbWS6IWfrXm4D3dfvXuBA/edit?gid=0#gid=0
Casado, A. et al. "Does Lactate-Guided Threshold Interval Training within a High-Volume Low-Intensity Approach Represent the “Next Step” in the Evolution of Distance Running Training?" International Journal of Environmental Research and Public Health 20(5), 2023, 3782, https://doi.org/10.3390/ijerph20053782.