@techreport{Petersen2022,
  author    = {Petersen, Finn},
  title     = {Cost efficient nutrient solutions from commercially available fertilizers},
  series    = {ISCDRA Newsletters},
  number    = {39},
  url       = {http://www.ruduckweed.org/uploads/1/0/8/9/10896289/duckweed_forum_issue_39_high_resolution.pdf},
  institution = {Fakult{\"a}t AuL},
  pages     = {165 -- 166},
  year      = {2022},
  language  = {en}
}