2Alkalay, R., Pastemak, G., Zazk, A.. Clean-coast indexda new approach forbeach cleanliness assessment[J]. Ocean Coast. Manag , 2007( 50 )352-362.
3Marcus Schulz, Daniel Neunmnn, David M. Fleet, Michael Matthies.A multi-criteria evaluation system for marine litter pol- lution based on statistical analyses of OSPAR beach litter monitor- ing time series[J]. Marine Environmental Research, 2013 ( 92 ) : 61-70.