Bioremediation of petroleum derived hydrocarbons in the plant mycorrhizosphereSen, R.; Sarand, Inga; Timonen, S.; Rajamäki, M.; Peltola, R.; Nurmiaho-Lassila, E.-L.; Koivula, T.; Haahtela, K.; Romantschuk, M.1st International Conference on Mycorrhizae, California, USA, Aug. 4-9, 19961996