Filipek, W; Broda, K (2017). «Experimental verification of the concept of the use of controlled pyrotechnic reaction as a source of energy as a part of the transport system from the seabed». Scientific Journals of the Maritime University of Szczecin. doi:10.17402/205 citing Papliński, A; Surma, Z; Dębski, A (2009). «Teoretyczna i eksperymentalna analiza parametrów balistycznych prochu czarnego». Materiały Wysokoenergetyczne (em polaco). 1: 89-94
Heller, Cornelia (Dezembro de 2009). «Stassfurt»(PDF). STASSFURT – FAD. Ministry of Regional Development and Transport Saxony-Anhalt. p. 10. Consultado em 27 de maio de 2015
PIDDOCK, S. (2007). Slate, slate, everywhere slate: The cultural landscapes of the Willunga slate quarries, South Australia. Australasian Historical Archaeology, 25, 5–18. Retrieved from http://www.jstor.org/stable/29544573
Jecock, Marcus; Dunn, Christopher; et al. (2009). «Gatebeck Low Gunpowder Works and the Workers' Settlements of Endmoor and Gatebeck, Cumbria». Research Department Report Series. 63. ISSN1749-8775