Fujimura 1961. Fujimura, Osamu (1961). "Bilabial stop and nasal consonants: A motion picture study and its acoustical implications". Journal of Speech and Hearing Research. 4 (3): 233–47. doi:10.1044/jshr.0403.233. PMID13702471.
Fujimura 1961. Fujimura, Osamu (1961). "Bilabial stop and nasal consonants: A motion picture study and its acoustical implications". Journal of Speech and Hearing Research. 4 (3): 233–47. doi:10.1044/jshr.0403.233. PMID13702471.