NEMETH, ERWIN (1 січня 2004). Measuring the Sound Pressure Level of the Song of the Screaming Piha Lipaugus Vociferans: One of the Loudest Birds in the World?. Bioacoustics. 14 (3): 225—228. doi:10.1080/09524622.2004.9753527. ISSN0952-4622. S2CID84218370.
NEMETH, ERWIN (1 січня 2004). Measuring the Sound Pressure Level of the Song of the Screaming Piha Lipaugus Vociferans: One of the Loudest Birds in the World?. Bioacoustics. 14 (3): 225—228. doi:10.1080/09524622.2004.9753527. ISSN0952-4622. S2CID84218370.
NEMETH, ERWIN (1 січня 2004). Measuring the Sound Pressure Level of the Song of the Screaming Piha Lipaugus Vociferans: One of the Loudest Birds in the World?. Bioacoustics. 14 (3): 225—228. doi:10.1080/09524622.2004.9753527. ISSN0952-4622. S2CID84218370.