P.M. Groffman, C.T. Driscoll, J. Durán, J.L. Campbell, L.M. Christenson, T.J. Fahey, M.C. Fisk, C. Fuss, G.E. Likens, G. Lovett, L. Rustad, and P.H. Templer. Nitrogen Oligotrophication in Northern Hardwood Forests. Biogeochemistry, 2018, 141, 523-539.
