@article {aNunes00,
	title = {A contour-based approach to binary shape coding using a multiple grid chain code},
	journal = {Signal processing: image communication},
	volume = {15},
	number = {7-8},
	year = {2000},
	pages = {585{\textendash}599},
	issn = {0923-5965},
	author = {Nunes, P. and Marqu{\'e}s, F. and Pereira, F. and Gasull, A.}
}
@conference {cSalembier99a,
	title = {Hierarchical visual description schemes for still images and video sequences},
	booktitle = {1999 IEEE International Conference on Image Processing, ICIP 1999},
	year = {1999},
	address = {Kobe, Japan},
	author = {Salembier, P. and O{\textquoteright}Connor, N. and Correia, P. and Pereira, F.}
}
