References
- Anonymous . 1993 . “ VIPS, vision image processing system ” . In Reference manual and users’ guide. Version 4.1 , Palmerston North, , New Zealand : Massey University .
- Crane , M. B. and Lewis , D. 1949 . Genetical studies in pears V. Vegetative and fruit characters . Heredity , 3 : 85 – 97 .
- van der Heijden , G. W. A. M. and Vossepoel , A. M. 1994 . On defining length and width for botanical object discrimination . Aspects of visual form processing , : 562 – 573 .
- Kajiura , I. and Suzuki , S. 1980 . Variations in fruit shapes of Japanese pear cultivars; geographic differentiations and changes by breeding . Japanese journal of breeding , 30 (4) : 309 – 328 .
- Pearson , E. S. and Hartley , H. O. 1976 . Biometrika tables for statisticians , Volume 1 , 269 London : Biometrika Trust .
- Rosati , P. , Rivalta , L , Gilbertoni , P. and Fideghelli , C. Study of some characters in different pear progenies . Proceedings of the EUCARPIA Fruit Breeding Symposium . 1979 , Angers. pp. 83 – 90 .
- Thibault , B. , Watkins , R. and Smith , R. A. 1983 . Descriptor list forpear , International Board for Plant Genetic Resources . IBPGR/82/57
- Williams , R.R. 1953 . “ Perry pears and their characters: 1 ” . In Annual report of the Long Ashton Research Station. 70 – 78 .
- White , A. G. and Bailey , D. G. 1995 . Digital imaging: a useful technique for analysing fruit shape in pears . Fruit varieties journal , 49 (4) : 224 – 226 .
- Zielinski , Q. B. , Reimer , F. C. and Quackenbush , V. L. 1965 . Breeding behaviour of fruit characteristics in pears, Pyrus communis L . Proceedings of the American Society for Horticultural Science , 86 : 81 – 87 .