@article{LekkoksungDenecke2019,
  author    = {Nareupanat Lekkoksung and Klaus-Dieter Denecke},
  title     = {The partial clone of linear tree languages},
  journal   = {Siberian mathematical journal},
  volume    = {60},
  number    = {3},
  pages     = {497 -- 507},
  doi       = {10.1134/S0037446619030121},
  year      = {2019},
}