Macho project limits on black hole dark matter in the 1-30 M⊙ range
Citation
Alcock, C, Allsman, R, Alves, D et al. 2001, 'Macho project limits on black hole dark matter in the 1-30 M⊙ range', Astrophysical Journal Letters, vol. 550, no. 2, pp. 169-172.