„Koncept "volných radikálů" nebyl v roce 1920 znám - dobře, možná v politice, ale ne v chemii.“
Originál: (en) The concept of "free radicals" was not known in 1920 — well, perhaps in politics, but not in chemistry.
Zdroj: [Mark, Herman Francis, 1993, From small organic molecules to large: a century of progress, American Chemical Society, 15, angličtina]
