@conference {cSerra93,
	title = {Connected operators and pyramids},
	booktitle = {SPIE Image Algebra and Mathematical Morphology},
	year = {1993},
	pages = {65{\textendash}76},
	address = {San Diego (CA), USA},
	isbn = {1522-4880},
	author = {Serra, J. and Salembier, P.}
}
