Paper  bibtex   

@unpublished{aiolli_spi:_1999,
	title = {{SPI}: {A} {System} for {Paleographic} {Inspections}},
	url = {http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.9.6980},
	author = {Aiolli, Fabio and Simi, Maria and Sona, Diego and Sperduti, Alessandro and Starita, Antonina and Starita, A. and Zaccagnini, Gabriele},
	year = {1999},
	keywords = {Analyse, Digitale Paläographie, Graphem-Modell}
}