Nikomohammadi, N. , , Alizadeh, H. , , Karimi, B. , , Hakimirad, E. , and Aminabadi, Z. . "The Effectiveness of Combined Training Program (Direct Instruction and Phonological awareness) in Spelling Errors among Elementary Students with Spelling Learning Disorder", Journal of Modern Psychological Researches, 10, 39, 2015, 189-204.