Fauria, Kristen E.; Manga, Michael; Wei, Zihan (February 2017). “Trapped bubbles keep pumice afloat and gas diffusion makes pumice sink”. Earth and Planetary Science Letters460: 50–59. Bibcode: 2017E&PSL.460...50F. doi:10.1016/j.epsl.2016.11.055.
Fischman, Stuart L. (October 1997). “The history of oral hygiene products: how far have we come in 6000 years?”. Periodontology 200015 (1): 7–14. doi:10.1111/j.1600-0757.1997.tb00099.x. PMID9643227.
Fischman, Stuart L. (October 1997). “The history of oral hygiene products: how far have we come in 6000 years?”. Periodontology 200015 (1): 7–14. doi:10.1111/j.1600-0757.1997.tb00099.x. PMID9643227.