1. Environmental Impact Assessment in Hope Bay, Antarctica;Acero,1991
2. Aguirre, C. A., and J. M. Acero In preparation Penguin Rookeries and Antarctic Stations: Do Adélie Penguin Habituate to Human Presence? Presented at the Workshop on Researcher-Seabirds Interaction, Minnesota, July.
3. Standard Methods for Monitoring Parameters for Species;CCAMLR,1991
4. Tourists in Antarctica: Numbers and Trends;Enzenbacher;Polar Record,1992
5. Favero, M., J. M. Acero, and P. Silva In Preparation Tourist Activity in Halfmoon Island, South Shetland, Antarctica.