Kremer, Richard L. Department Structural Changes in Systems of Knowledge, Max Planck Institute for the History of Science, Max Planck Society;
Kremer, R. L. (2016). Playing with geometrical tools: Johannes Stabius's Astrolabium imperatorium (1515) and its successors. Centaurus, 58(1/2), 104-134. doi:10.1111/1600-0498.12112.