Ghassemi, M., M. Pimentel, T. Naumann, T. Brennan, D. Clifton, P. Szolovits, and M. Feng. “A Multivariate Timeseries Modeling Approach to Severity of Illness Assessment and Forecasting in ICU With Sparse, Heterogeneous Clinical Data”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 29, no. 1, Feb. 2015, doi:10.1609/aaai.v29i1.9209.