1. Handbook of mathematical functions;Abramowitz,1972
2. Model-based Gaussian and non-Gaussian clustering;Banfield;Biometrics,1993
3. Automatic differentiation in machine learning: a survey;Baydin;Journal of Machine Learning Research,2018
4. Programs for automatic differentiation for the machine BESM;Beda,1959
5. Unsupervised learning using Gaussian mixture copula model;Bhattacharya,2014