* [[https://www.ronnietractors.com/|@]]Tο τρακτέρ Oggún. 
  * [[https://civileats.com/2022/04/27/right-to-repair-open-source-tractors-john-deere-oggun-farms-profitability-technology/|@]]Ρεπορταζ απο τον ιστοτοπο civileats. //'In the Battle Over the Right to Repair, Open-Source Tractors Offer an Alternative'//