The previous page is sending you to http://www.researchgate.net/profile/Ronny_Roessler/publication/257765924_The_root_systems_of_Permian_arborescent_sphenopsids_evidence_from_the_Northern_and_Southern_hemipheres/links/0046353c52ab2e6291000000?origin=publication_detail.

 If you do not want to visit that page, you can return to the previous page.