Some online resources concerning statistical distributions and matrices:
Distributions:
- Probability distribution on Wikipedia.
- Statistical distributions on Wolfram MathWorld.
- Probability Distribution Explorer (by Justin Boison, 2019).
- Handbook on statistical distributions (by Christian Walck, 2007).
- Lecture notes: exponential families (by Charles J. Geyer, 2020).
Matrices:
- The Matrix Cookbook (by Kaare B. Petersen and Michael S. Pedersen, 2012).
- Matrix Reference Manual (by Mike Bookes, 2021).