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SOURCES – How the ballpoint pen was once restricted technology

The following sources were consulted in the preparation of the article “How the ballpoint pen was once restricted technology.”

  1. Characteristics of the Ball Point Pen and Its Influence on Handwriting Identification
  2. The Influence of Writing Instruments on Handwriting and Signatures
  3. Ballpoint Birome
  4. If You Like Ballpoint Pens, Thank the R.A.F.
  5. Why the Invention of the Ballpoint Pen Was Such a Big Deal
  6. How Ballpoint Pens Work