If you meant a scientific paper about DirectX 8.1, that does not exist – it's a proprietary graphics API, not a research subject. However, papers on (e.g., WineD3D, DXVK) would be relevant.
If you meant a scientific paper about DirectX 8.1, that does not exist – it's a proprietary graphics API, not a research subject. However, papers on (e.g., WineD3D, DXVK) would be relevant.