Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI)
SCHOLTEN CJ.,"The timing of molt in relation to age, sex and breeding status in a group of captive Humboldt penguins (Spheniscus humboldti) at Emmen zoo, the Netherlands",Netherlands J Zool,,,1989,39,,113-125,https://cir.nii.ac.jp/crid/1574231874418690048,