Comparisons of Probabilistic and Non-probabilistic Hough Transforms. - Heikki Kälviäinen; Petri Hirvonen; Lei Xu 001; Erkki Oja (ECCV (2), 1994)

Probabilistic and non-probabilistic Hough transforms: overview and comparisons. - Heikki Kälviäinen; Petri Hirvonen; Lei Xu 001; Erkki Oja (Image Vis. Comput., 1995)

Houghtool – A software package for the use of the Hough transform. - Heikki Kälviäinen; Petri Hirvonen; Erkki Oja (Pattern Recognit. Lett., 1996)

An extension to the randomized hough transform exploiting connectivity. - Heikki Kälviäinen; Petri Hirvonen (Pattern Recognit. Lett., 1997)

Estimating the distribution of particle dimensions from electron microscope images. - Petri Hirvonen; Heikki Huttunen; Maija Lappi (Image Processing: Algorithms and Systems, 2006)