TY - JOUR AU - Alexey Slinkin AU - Alexander Varchenko TI - Twisted de Rham Complex on Line and Singular Vectors in $\widehat{{\mathfrak{sl}_2}}$ Verma Modules JO - Symmetry, integrability and geometry: methods and applications PY - 2019 VL - 15 UR - http://geodesic.mathdoc.fr/item/SIGMA_2019_15_a74/ LA - en ID - SIGMA_2019_15_a74 ER -