Yuan Gazdeck, Leslie. Location of the mandibular lingula in pediatric patients using CBCT images, 2017: title page (Johan Aps; University of Washington; Pediatric Dentistry)

OCLC, Oct. 13, 2017 (access point: Aps, Johan K. M.; no usage shown)

University of Western Australia website, viewed on 1 May 2019: staff page (Johan Aps, Associate Professor, Faculty of Health and Medical Sciences, Oral Diagnostic and Surgical Sciences. Also lectured at Ghent University, Languages: Dutch (native language) French, German, and English)

Het tandheelkundig jaar 2017, 2016: title page (edited by J.K.M. Aps)