Kakeshita H, Takamatsu H, Amikura R, Nakamura K, Watabe K, Yamane K. Effect of depletion of FtsY on spore morphology and the protein composition of the spore coat layer in Bacillus subtilis. FEMS Microbiol Lett. 2001 Feb 05;195(1):41–6. doi: 10.1111/j.1574-6968.2001.tb10495.x. PMID: 11166993.