Researchr is a web site for finding, collecting, sharing, and reviewing scientific publications, for researchers by researchers.
Sign up for an account to create a profile with publication list, tag and review your related work, and share bibliographies with your co-authors.
Laura K. Young, Julie L. Booth. Student Magnitude Knowledge of Negative Numbers. JNC, 1(1):38-55, 2015. [doi]
Abstract is missing.