Team S. On Best Approximation and Best Coapproximation: Tulsi Dass Narang, Sahil Gupta. Thai J Math [Internet]. 2016 Aug. 1 [cited 2024 Dec. 22];14(2):505-16. Available from: https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/614