1: Blenkharn JI. Biological activity of polynoxylin--an insoluble urea-formaldehyde condensation product. J Clin Hosp Pharm. 1985 Dec;10(4):367-72. 7: Robbs J. The clinical evaluation of polynoxylin as an aerosol in the prevention of wound sepsis. Br J Clin Pract. 1972 Mar;26(3):127-8. German. 13: TOMASINI C. [Clinical experience with the topical use of a new preparation derived from the polycondensation of urea and formaldehyde (Anaflex)]. G Ital Dermatol. 1962 Jan-Feb;103:56-61. Italian.