A comprehensive bibliographic database of papers in computational geometry (including graph layout) can be found at:

http://compgeom.cs.uiuc.edu/~jeffe/compgeom/biblios.html.

The following bibliographic survey paper is recommended:

Di Battista, Giuseppe, Peter Eades, Roberto Tamassia, and Ioannis G. Tollis. “Algorithms for Drawing Graphs: an Annotated Bibliography.” Computational Geometry: Theory and Applications 4 (1994): 235-282 (also available at

http://www.cs.brown.edu/people/rt/gd-biblio.html.