1. Cao F, Huang HK, Pietka E, Gilsanz V (2000) Digital hand atlas and web-based bone age assessment: system design and implementation. Comput Med Imag Graph 24:297–307
2. Cao F, Huang HK, Pietka E, Gilsanz V, Dey PS, Gertych A (2002) An image database for digital hand atlas and its application to other PACS-based CAD servers. Radiology 225:139
3. Cope RK, Rockett PI (2000) Efficacy of Gaussian smoothing in Canny edge detector. Electron Lett 36:1615–1617
4. Greulich WW, Pyle SI (1959) Radiographic atlas of skeletal development of the hand and wrist. Stanford University Press, Stanford
5. Haykin S (1999) Neural networks, 2nd edn. Prentice Hall, Englewood Cliffs