@book{vtkBook,
    author = {W. Schroeder and K. Martin and B. Lorensen},
    year = {2006},
    month = {December},
    publisher = {Kitware, Inc.},
    title = {The Visualization Toolkit: {A}n Object-Oriented Approach To {3D} Graphics, 4th Edition},
}

@book{foley,
author = {J. D. Foley and A. van Dam and S. K. Feiner and J. F. Hughes},
year = {1990},
month = {June},
publisher = {Addison-Wesley},
title = {Computer Graphics: Principles and Practice}
}