TY - RPRT TI - Endogenous low molecular weight factors, vitamin A and phorbol esters dramatically affect pattern formation and positional values in marine hydroids. AU - S Berking AU - G Plickert AU - W A Müller PY - 1986 UR - https://pubmed.ncbi.nlm.nih.gov/2875467/ ID - 2875467 ER -