Pfüller, U.; Franz, H.; Preiss, A. (1977). "Histochemistry. 1977 Dec 7;54(3):237-50. Sudan Black B: chemical structure and histochemistry of the blue main components. Pfüller U, Franz H, Preiss A". Histochemistry. 54 (3): 237–250. doi:10.1007/BF00492246. PMID75201. S2CID2839405.
Pfüller, U.; Franz, H.; Preiss, A. (1977). "Histochemistry. 1977 Dec 7;54(3):237-50. Sudan Black B: chemical structure and histochemistry of the blue main components. Pfüller U, Franz H, Preiss A". Histochemistry. 54 (3): 237–250. doi:10.1007/BF00492246. PMID75201. S2CID2839405.
Pfüller, U.; Franz, H.; Preiss, A. (1977). "Histochemistry. 1977 Dec 7;54(3):237-50. Sudan Black B: chemical structure and histochemistry of the blue main components. Pfüller U, Franz H, Preiss A". Histochemistry. 54 (3): 237–250. doi:10.1007/BF00492246. PMID75201. S2CID2839405.