Conceptual system for classification of psychogenic school underachievement. Wimberger HC. J Pediatr. 1966 Dec;69(6):1092-7. doi: 10.1016/s0022-3476(66)80300-1. PMID: 5926472
Validity of alternative approaches for the identification of learning disabilities: operationalizing unexpected underachievement. Fletcher JM, Denton C, Francis DJ. J Learn Disabil. 2005 Nov-Dec;38(6):545-52. doi: 10.1177/00222194050380061101. PMID: 16392697
Learning disability: truth or trap?. Ames LB. J Learn Disabil. 1983 Jan;16(1):19-20. doi: 10.1177/002221948301600105. PMID: 6833857
Early identification of children with learning disabilities. Haring NG, Ridgway RW. Except Child. 1967 Feb;33(6):387-95. PMID: 6037431
Pseudo-Malignancy: A Defensible Neologism?. Davies JD. Bristol Med Chir J. 1983 Oct;98(4):202. PMID: 28906660
Psychometric and qualitative comparison of four preschool screening instruments. Miller LJ, Sprong TA. J Learn Disabil. 1986 Oct;19(8):480-4. doi: 10.1177/002221948601900807. PMID: 3760699
SCHOLASTIC UNDERACHIEVEMENT IN CHILDHOOD. HAMMOND K. Pediatr Clin North Am. 1965 May;12:307-8. doi: 10.1016/s0031-3955(16)31704-7. PMID: 14276881