90 (7): 947–949. doi:10.1021/ed3006506. ↑ US 2810716, Markus, Richard L., "Batchwise copolymerization technique", published October 22, 1957 ↑ US 3229769, Bashaw, Robert N., "Method for controlling the spread of fire", published January 18, 1966 ↑ "BARRICADE II FIRE BLOCKING GEL MSDS" (PDF). Retrieved 2013-05-22. ↑ "BARRICADE II Residential FAQs". Retrieved 2013-05-22. ↑ Kafka, Joe (Associated Press writer) (October 9, 2007).