@article{789933,
      author = {De Kok, L. J. and Hawkesford, Malcolm J., and Haneklaus,  Silvia H., and Schnug, Ewald,},
      url = {http://library.usi.edu/record/789933},
      title = {Sulfur metabolism in higher plants : fundamental,  environmental and agricultural aspects /},
      recid = {789933},
      pages = {1 online resource :},
}