A gelatin in situ-overlay technique localizes brain matrix metalloproteinase activity in experimental focal cerebral ischemia - Loy, M.; Burggraf, D.; Martens, K.H.; Liebetrau, M.; Wunderlich, N.; Bültemeier, G.; Nemori, R.; Hamann, G.F. (Journal of Neuroscience Methods, 2002)