TY  - RPRT
TI  - Sonic hedgehog: making the gradient.
AU  - D A Bumcrot
AU  - A P McMahon
PY  - 1996
DO  - 10.1016/s1074-5521(96)90077-0
UR  - https://pubmed.ncbi.nlm.nih.gov/8807822/
ID  - 8807822
ER  -