MEKONNEN, Abreham; PIJL, Em M. Spatial analysis of discarded needles and dropbox locations in Calgary, Canada. Canadian Journal of Urban Research, [S. l.], v. 31, n. 1, p. 1–15, 2022. DOI: 10.36939/cjur/vol31no1/art387. Disponível em: https://cjur.uwinnipeg.ca/index.php/cjur/article/view/387. Acesso em: 9 jun. 2026.