Gilbert, Scott F.; College, Swarthmore; Helsinki, the University of (2014). Developmental biology (Tenth ed.). Sunderland, Mass.: Sinauer. ISBN978-0878939787.
Huang, C; Chan, JA; Schuurmans, C (2014). "Proneural bHLH Genes in Development and Disease". BHLH Transcription Factors in Development and Disease. Current Topics in Developmental Biology. Vol. 110. pp. 75–127. doi:10.1016/B978-0-12-405943-6.00002-6. ISBN9780124059436. PMID25248474.
Huang, C; Chan, JA; Schuurmans, C (2014). "Proneural bHLH Genes in Development and Disease". BHLH Transcription Factors in Development and Disease. Current Topics in Developmental Biology. Vol. 110. pp. 75–127. doi:10.1016/B978-0-12-405943-6.00002-6. ISBN9780124059436. PMID25248474.