Linking coefficients for geodesic flow and applications for magnetic equilibrium

Geodesics flows on the unit tangent bundle for hyperbolic orbifolds of type $(p,q,\infty)$ is investigated in [1]. Applications for quadratic magnetic helicities, (see [2] for definition)  are presented.
[1]\;Pierre Dehornoy, Geodesic flow; left-handedness, and templates; arXiv:1112.6296v2 [math.GT] 11 Apr 2012.
[2]\;Petr Akhmet'ev, Quadratic Helicities and the Energy of Magnetic Fields; Proceedings of the Steklov Institute of Mathematics, 2012, Vol. 278, pp. 10–21.