Judson, Olivia (1992). "'anting' as food preparation: formic acid is worse on an empty stomach". Behavioral Ecology and Sociobiology. 31 (6): 437–439. Bibcode:1992BEcoS..31..437J. doi:10.1007/BF00170611.
Judson, Olivia (1992). "'anting' as food preparation: formic acid is worse on an empty stomach". Behavioral Ecology and Sociobiology. 31 (6): 437–439. Bibcode:1992BEcoS..31..437J. doi:10.1007/BF00170611.