https://arxiv.org/abs/astro-ph/0412669
[astro-ph/0412669] Cool Customers in the Stellar Graveyard II: Limits to Substellar Objects Around...
Abstract page for arXiv paper astro-ph/0412669: Cool Customers in the Stellar Graveyard II: Limits to Substellar Objects Around Nearby DAZ White Dwarfs