Schilling, Anne Max Planck Institute for Mathematics, Max Planck Society;
Schilling, A., Okado, M., & Shimozono, M. (2003). Virtual crystals and fermionic formulas of type D_{n+1}^{(2)}, A_{2n}^{(2)}, and C_n^{(1)}. Representation Theory, 7, 101-163.