Hardy, R. J., Palmer, E., Dobson, V., Summers, G., Good, W. V., Phelps, D., et al. (2003). Risk analysis of prethreshold retinopathy of prematurity. Archives Of Ophthalmology, 121(12), 1697-701. 10.1001/archopht.121.12.1697(Original work published 2003)
