Buchanan, 2006, p. 2 «With its ninth century AD origins in China, the knowledge of gunpowder emerged from the search by alchemists for the secrets of life, to filter through the channels of Middle Eastern culture, and take root in Europe with consequences that form the context of the studies in this volume.» Buchanan, Brenda J., ed. (2006), Gunpowder, Explosives and the State: A Technological History, Aldershot: Ashgate, ISBN0-7546-5259-9Архивная копия от 5 марта 2016 на Wayback Machine
Buchanan, 2006, p. 2 «With its ninth century AD origins in China, the knowledge of gunpowder emerged from the search by alchemists for the secrets of life, to filter through the channels of Middle Eastern culture, and take root in Europe with consequences that form the context of the studies in this volume.» Buchanan, Brenda J., ed. (2006), Gunpowder, Explosives and the State: A Technological History, Aldershot: Ashgate, ISBN0-7546-5259-9Архивная копия от 5 марта 2016 на Wayback Machine
