Literature

Ryan, P.G. et al., 2009. Monitoring the abundance of plastic debris in the marine environment. Philosophical Transactions of the Royal Society B: Biological Sciences, 364(1526), pp.1999 - 2012. Available at: https://royalsocietypublishing.org/doi/abs/10.1098/rstb.2008.0207.

Ryan, P.G., 2015. A Brief History of Marine Litter Research. In M. Bergmann, Gutow, L., & Klages, M., eds. Marine Anthropogenic Litter. Marine Anthropogenic Litter. Cham: Springer International Publishing, pp. 1 - 25. Available at: https://doi.org/10.1007/978-3-319-16510-3_1.