TY - RPRT TI - Electronic states in graded-composition heterostructures. AU - S Vlaev AU - VR Velasco AU - F GarcĂ­a-Moliner PY - 1994 DO - 10.1103/physrevb.49.11222 UR - https://pubmed.ncbi.nlm.nih.gov/10009972/ ID - 10009972 ER -