1. Bhattacharya A, Bhattacharya R (2012) Nonparametric inference on manifolds: with applications to shape spaces. Cambridge University Press, Cambridge
2. Billard L (2011) Brief overview of symbolic data and analytic issues. Stat Anal Data Min 4(2):149–156
3. Breiman L, Friedman JH, Olshen RA, Stone CJ (1984) Classification and regression trees. Wadsworth Inc
4. Coppersmith D, Winograd S (1990) Matrix multiplication via arithmetic progressions. J Symb Comput 9:251–280
5. Cormen TH, Leiserson CE, Rivest RL, Stein C (2009) Introduction to algorithms, 3rd edn. MIT Press and McGraw Hill