Helms, H. C., Madelung, R., Waagepetersen, H. S., Nielsen, C. U., & Brodin, B. (2012). In vitro evidence for the brain glutamate efflux hypothesis: Brain endothelial cells cocultured with astrocytes display a polarized brain-to-blood transport of glutamate. GLIA -NEW YORK-, 60(6), 882-893.

Helms, H. C., R. Madelung, H. S. Waagepetersen, C. U. Nielsen, and B. Brodin. "In Vitro Evidence for the Brain Glutamate Efflux Hypothesis: Brain Endothelial Cells Cocultured with Astrocytes Display a Polarized Brain-to-blood Transport of Glutamate." GLIA -NEW YORK- 60, no. 6 (2012): 882-893.

Helms, H. C., et al. "In Vitro Evidence for the Brain Glutamate Efflux Hypothesis: Brain Endothelial Cells Cocultured with Astrocytes Display a Polarized Brain-to-blood Transport of Glutamate." GLIA -NEW YORK-, vol. 60, no. 6, 2012, pp. 882-893.