@article{Walczak:2019,
  author  = "P. Walczak",
  title   = "Why piaget does not philosophize? Critical discussion of Gareth B. Mathews with the piagetan concept of cognitive development",
  journal = "Childhood & Philosophy",
  volume  = "vol. 15",
  pages   = "1--25",
  year    = "2019",
}