SO3 (...)-representation curves for two-bridge knot groups. Michael Heusener — 1994 Mathematische Annalen
Representations of palindromically presented groups onto finite subgroups of SO 3 ( ℝ ) Michael Heusener — 1995 Mathematica Slovaca
Deformations of reducible representations of 3-manifold groups into PSL 2 ( C ) . Heusener, Michael; Porti, Joan — 2005 Algebraic & Geometric Topology