Wildansyah D, Perdhana Dalimunthe G. Competitive Strategy For a Niche Oilfield Service Company in Indonesia: a Case Study of Vikingr. JAFM [Internet]. 2026 Jul. 21 [cited 2026 Sep. 16];7(3):1003-14. Available from: https://www.dinastires.org/JAFM/article/view/3505