History of the Development of the ICD. http://www.who.int/classifications/icd/en/HistoryOfICD.pdf
Projected Impact of the ICD-10-CM/PCS Conversion on Longitudinal Data and the Joint Commission Core Measures http://perspectives.ahima.org/projected-impact-of-the-icd-10-cmpcs-conversion-on-longitudinal-data-and-the-joint-commission-core-measures/#.VZLK__lViko