Schade , J. D., E. C. Seybold, T. Drake, S. Spawn, W. V. Sobczak, K. E. Frey, R. M. Holmes, and N. Zimov. “Variation in Summer Nitrogen and Phosphorus Uptake Among Siberian Headwater Streams”. Polar Research, vol. 35, June 2016, doi:10.3402/polar.v35.24571.