Yang L. Adaptive Enriched Rational Spectral Methods with sinh transformations and asymptotic correctors for variable-coefficient singular perturbation problems. Adv. Differ. Equ. Control Process. [Internet]. 2026Feb.9 [cited 2026Apr.21];33(1). Available from: https://ojs.acad-pub.com/index.php/ADECP/article/view/3821