?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Heijne%2C+Dr.+Bart&rft.aulast=Heijne&rft.aufirst=Bart&rft.date=2006&rft.title=Promotion+of+leaf+degradation+by+earthworms+under+laboratory+conditions&rft.genre=proceeding