ENH: Add Chapter 4 references to the Bibtex bibliography.
ENH: Add Chapter 4 references to the Bibtex bibliography.

Add the Chapter 4 references to the Bibtex bibliography.

lorensen/VTKExamples,lorensen/VTKExamples,lorensen/VTKExamples,lorensen/VTKExamples,lorensen/VTKExamples,lorensen/VTKExamples,lorensen/VTKExamples