Peng, Gongguan (2011). A phonetic study of Fuzhou Chinese(PDF) (Thesis). City University of Hong Kong. Note that the thesis does not mention the open rimes for /e/, /ø/ and /eu/ and does not analyse phonemes independently from tonal allophones.
Mei, Tsu-lin (1970), "Tones and prosody in Middle Chinese and the origin of the rising tone", Harvard Journal of Asiatic Studies, 30: 86–110, doi:10.2307/2718766, JSTOR2718766
Ying-Chi Lai, Grace; Lo, Graciete; Ngo, Hong; Chou, Yuwen; Yang, Lawrence (30 Apr 2012). Migration, sociocultural factors, and local cultural worlds among Fuzhounese Chinese immigrants: implications for mental health interventions. Vol. 6. pp. 141–155. doi:10.1080/17542863.2012.674785. PMC5289411.
Mei, Tsu-lin (1970), "Tones and prosody in Middle Chinese and the origin of the rising tone", Harvard Journal of Asiatic Studies, 30: 86–110, doi:10.2307/2718766, JSTOR2718766
Ying-Chi Lai, Grace; Lo, Graciete; Ngo, Hong; Chou, Yuwen; Yang, Lawrence (30 Apr 2012). Migration, sociocultural factors, and local cultural worlds among Fuzhounese Chinese immigrants: implications for mental health interventions. Vol. 6. pp. 141–155. doi:10.1080/17542863.2012.674785. PMC5289411.