A study of low-energy transfer orbits to the Moon: towards an   operational optimization technique
  In the Earth-Moon system, low-energy orbits are transfer trajectories from the earth to a circumlunar orbit that require less propellant consumption when compared to the traditional methods. In this work we use a Monte Carlo approach to study a great number of such transfer orbits over a wide range of initial conditions. We make statistical and operational considerations on the resulting data, leading to the description of a reliable way of finding "optimal" mission orbits with the tools of multi-objective optimization. 
Roberto Capuzzo-Dolcetta, Marco Giancotti
astro-ph.EP