CAMPAGNOLO, Leonardo Quatrin; 						CELES, Waldemar.
 Interactive directional ambient occlusion and shadow computations for volume ray casting. <em>In</em>: CONFERENCE ON GRAPHICS, PATTERNS AND IMAGES (SIBGRAPI), 32.	, 2019, Rio de Janeiro.
	 
	<strong>Anais</strong> [...].
 Porto Alegre: Sociedade Brasileira de Computação, 
	2019
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	DOI: <a href="https://doi.org/10.5753/sibgrapi.2019.9819">https://doi.org/10.5753/sibgrapi.2019.9819</a>.