Maria Pettineo, Marius Stoka
      Laplace type problem for a lattice with cell composed by three triangles
      Applied Mathematical Sciences, Vol. 11, 2017, no. 18, 897-903
      https://doi.org/10.12988/ams.2017.7396
Copyright © 2017 Maria Pettineo and Marius Stoka. This article is distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.