IEEE Trans. on Soft. This is an excellent paper on a seminal work on visualization of software source code. Developed at Bell Labs, SeeSoft is a visualization system that allows one to look at tens of thousands of lines of code simultaneously. Those lines of code are displayed as thin lines on the computer screen. Colors are used to visualize statistics on several attributes of interest in the code.
Interactive controls allow users to drill up and down the source code display.
Thomas A. Ball and Stephen G. Eick. Software Visualization in the Large. 33-43, April 1996. This paper is a follow up of the previous one. It presents the authors' work on software visualization in a form that is more oriented to software engineering practitioners.