TYCHOs Documentation can be downloaded as PDF version or browsed online here.

The documentation is good starting for using TYCHO. It is not meant as a introdution in hydrodynamic-methods.

The Piecewise Parabolic Method (PPM), which is the core in TYCHO, was introduced by Colella P. and Woodward Paul R in 1984.

The reference can be found at http://adsabs.harvard.edu/abs/1984JCoPh..54..174C