Rascher G, Fischmann A, Kröger S, Duffner F, Grote EH, Wolburg H. Extracellular matrix and the blood-brain barrier in glioblastoma multiforme: spatial segregation of tenascin and agrin. Acta Neuropathol. 2002 Jul;104(1):85–91. doi: 10.1007/s00401-002-0524-x. PMID: 12070669.