Questaal: A package of electronic structure methods based on the linear muffin-tin orbital technique. - Dimitar Pashov; Swagata Acharya; Walter R. L. Lambrecht; Jerome Jackson; Kirill D. Belashchenko; Athanasios Chantis; François Jamet; Mark van Schilfgaarde (Comput. Phys. Commun., 2020)