@article{article72aa4537,
title   = {Plant hormone ethylene is a norrish type-ii product from enzimically generated triplet 1-butanal},
author = {Knudsen, F S and Campa, Ana and Stefani, Hélio Alexandre and Cilento, G},
year = {1994},
journal   = {Proceedings of the National Academy of Sciences of the United States of America}
}