B. N. Araabi, N. Kehtarnavaz and C. Lucas, Restrictions imposed by the fuzzy extension of relations
and functions, Journal of Intelligent and Fuzzy Systems, 11(1/2) (2001) 9-22.
 I. Bloch and H. Maitre, Mathematical morphology on fuzzy sets, Proc. Int. Workshop Mathematical
Morphology and its Applications to Signal Processing, Barcelona, Spain, (1993) 151-156.
 I. Bloch and H. Maitre, Fuzzy mathematical morphologies: A comparative study, Pattern
Recognition, 28(9) (1995) 1341-1387.
 A. P. Dempster, Upper and lower probabilities induced by a multi-valued mapping, Annals of
Mathematical Statistics, 38(2) (1967) 325-339.
 C. R. Giardina and D. Sinha, Image processing using pointed fuzzy sets, Proc. VIII SPIE Conf.
Intelligent Robots and Computer Vision: Algorithms and Techniques, Philadelphia, USA, 1192
 V.Goetcherian, From binary to gray tone image processing using fuzzy logic concepts, Pattern
Recognition, 12(1) (1980) 7-15.
 R. C. Gonzalez and R. E. Woods, Digital image processing, Prentice Hall, New York, USA, (2002).
 M. Kauffman and M. M. Gupta, Fuzzy mathematical models in engineering and management
science, Elsevier, North-Holland, New York, USA (1988).
 J. S. J. Lee, R. M. Haralick, and L. G. Shapiro, Morphologic edge detection, IEEE Transactions on
Robotics and Automation, 3(2) (1987) 142-156.
 C. Lucas and B. N. Araabi, Generalization of the Dempster-Shafer theory: A fuzzy-valued measure,
IEEE Transactions on Fuzzy Systems, 7(3) (1999) 255-270.
 P. Maragos and R. W. Schafer, Morphological filters-Part I: Their set-theoretic analysis and
relations to linear shift-invariant filters, IEEE Transactions on Acoustics, Speech, and Signal
Processing, 35(8) (1987) 1153-1169.
 P. Maragos and R. W. Schafer, Morphological filters-Part II: Their relations to median,
order-statistics, and stack filters, IEEE Transactions on Acoustics, Speech, and Signal Processing,
35(8) (1987) 1170-1184.
 G. Matheron, Random sets and integral geometry, John Wiley, New York, USA, (1975).
 J. Serra, Image analysis and mathematical morphology, Academic press, London, UK, (1982).
 J. Serra, Introduction to mathematical morphology, Computer Vision, Graphics and Image
Processing, 35(3) (1986) 283-305.
 G. Shafer, A mathematical theory of evidence, Princeton University Press, Princeton, USA, (1976).
 D. Sinha and E. R. Dougherty, A General axiomatic theory of intrinsically fuzzy mathematical
morphologies, IEEE Transactions on Fuzzy Systems, 3(4) (1995) 389-403.
 D. Sinha and E. R. Dougherty, Fuzzy mathematical morphology, Visual Communication and Image
Representation, 3(3) (1992) 286-302.
 D. Sinha, P. Sinha, E. R. Dougherty, and S. Batman, Design and analysis of fuzzy morphological
algorithms for image processing, IEEE Transactions on Fuzzy Systems, 5(4) (1997) 570-584.
 R. L. Stevenson and G. R. Arce, Morphological filters: Statistics and further syntactic properties,
IEEE Transactions on Circuits and Systems, 34(11) (1987) 1292-1305.
 L. XiangJi and D. RunTao, Fuzzy morphological operators to edge enhancing of images, Proc. 4th
IEEE Int. Conf. Signal Processing, Beijing, China, 2 (1998) 1017-1020.