| article html file updated | 7 February 2020 10:27 CET | Update | https://www.mdpi.com/2227-7102/6/2/18 |
| article html file updated | 5 May 2019 12:24 CEST | Update | N/A |
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| article html file updated | 9 November 2017 12:38 CET | Update | N/A |
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| article html file updated | 20 June 2016 15:28 CEST | Original file | N/A |
| article xml uploaded. | 20 June 2016 15:27 CEST | Original file | https://www.mdpi.com/2227-7102/6/2/18/xml |
| article pdf uploaded. | 20 June 2016 15:27 CEST | Version of Record | https://www.mdpi.com/2227-7102/6/2/18/pdf |
