H. Markensten
Pierson, D. C., Gesa A. Weyhenmeyer, L. Arvola, Barbara J. Benson, T. Blencker, Timothy K. Kratz, D.M. Livingstone, et al. 2011. “An Automated Method To Monitor Lake Ice Phenology”. Limnol. Oceanogr. Methods. doi:10.4319/lom.2011.9.74.