Kristiansen LP, Steen H. Reduced lengthening index by use of bifocal osteotomy in the tibia: Comparison of monofocal and bifocal procedures with the Ilizarov external fixator. ActaO [Internet]. 2002 Jan. 1 [cited 2025 Feb. 22];73(1):93-7. Available from: https://actaorthop.org/actao/article/view/19862