currui_year1989.bib

@misc{tactile89en,
  author = {Rui Araújo},
  title = {Tactile Sensors},
  address = {Coimbra, Portugal},
  month = {November},
  year = {1989},
  note = {Technical Report (in Portuguese). Departament of Electrical Engineering, Faculty of Sciences and Technology, University of Coimbra.},
  url = {tactile89.pdf}
}