Some of Puin's initial remarks on his findings are found in his essay titled the "Observations on Early Qur'an Manuscripts in San'a" which has been republished in the book What the Koran Really Says by Ibn Warraq.
Nogle af de indledende bemærkninger om Puins forskningsresultater findes i hans essay med titlen: Observations on Early Qur'an Manuscripts in San'a der er offentliggjort i bogen "What the Koran Really Says" af Ibn Warraq.