Was 'A probabilistic Hough transform' not not published in 1991?
Was the paper 'A probabilistic Hough transform' not not published in the year 1991?
ASK { <https://dblp.org/rec/journals/pr/KiryatiEB91> <https://dblp.org/rdf/schema#yearOfPublication> '1991' }
<https://dblp.org/rec/journals/pr/KiryatiEB91>