An ultra-short-period super-Earth and a sub-Neptune orbiting the K dwarf TOI-4311. - Eschen, Yoshi Nike Emilia; Wilson, Thomas G; Cameron, Andrew Collier; Mustill, Alexander James; Egger, Jo Ann; Ulmer-Moll, Solène; Gandolfi, Davide; Smith, Alexis M S; Demangeon, Olivier D S; Sousa, Sérgio G (Monthly Notices of the Royal Astronomical Society, 2026)