Wiley Interscience gives away a bunch of whitepapers, not the most recent ones but it's a freebie.
Real-Time GPU Silhouette Refinement using Adaptively Blended Bézier Patches
Occlusion Textures for Plausible Soft Shadows
Volume and Isosurface Rendering with GPU-Accelerated Cell Projection
Pressing: Smooth Isosurfaces with Flats from Binary Grids
A Dynamic Model of Cracks Development Based on a 3D Discrete Shrinkage Volume Propagation
Point-Based Rendering of Non-Manifold Surfaces
A General Multi-step Algorithm for Voxel Traversing Along a Line
A Sketch-Based User Interface for Reconstructing Architectural Drawings
Object-Space Visibility Ordering for Point-Based and Volume Rendering
A Flexible Kernel for Adaptive Mesh Refinement on GPU
