Medium Effects in Cooling of Neutron Stars and $3P_2$ Neutron Gap
  We study the dependence of the cooling of isolated neutron stars on the magnitude of the $3P_2$ neutron gap. It is demonstrated that our ``nuclear medium cooling'' scenario is in favor of a suppressed value of the $3P_2$ neutron gap. 
H. Grigorian and D.N. Voskresensky