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Gruber DP, Zimmerman GA, Tomsick TA, van Loveren HR, Link MJ, Tew JM Jr.Gruber DP, et al.J Neurosurg. 1999 May;90(5):868-74. doi: 10.3171/jns.1999.90.5.0868.J Neurosurg. 1999.PMID: 10223453
Van Loveren HR, Mahmood A, Liu SS, Gruber D.Van Loveren HR, et al.Clin Neurosurg. 1996;43:44-52.Clin Neurosurg. 1996.PMID: 9247794Review.No abstract available.