Study of planar Ising ferromagnet on the triangular lattice with   selective dilution
  In the paper the Curie temperatures of selectively diluted planar Ising ferromagnet on the triangular lattice are calculated vs. concentration of magnetic atoms. Various analytical approaches are compared with the exact numerical calculations for finite clusters, as well as with the exact analytical solutions for the triangular and honeycomb lattices. 
T. Balcerzak, K. Sza{\l}owski, M. \v{Z}ukovi\v{c}, M. Borovsk\'y, A.   Bob\'ak, M. Ja\v{s}\v{c}ur
cond-mat.stat-mech cond-mat.dis-nn