The behavior of the sextic coupling for the the three-dimensional   $\phi^4 $ theory
  In this work we use the lattice regularization method to study the behavior of the six point renormalized coupling constant defined at zero momentum for the three-dimensional $\phi^4 $ theory in the intermediate and strong coupling domain. The result is in good agreement with the corresponding study in the Ising limit. 
Gino N. J. Ananos and Marcelo P. S. Pinheiro