| article html file updated | 8 February 2020 01:43 CET | Update | https://www.mdpi.com/2076-3263/7/1/13 |
| article html file updated | 23 September 2019 21:15 CEST | Update | - |
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| article html file updated | 25 July 2017 10:22 CEST | Update | - |
| article html file updated | 18 March 2017 08:17 CET | Original file | - |
| article xml uploaded. | 18 March 2017 08:16 CET | Original file | https://www.mdpi.com/2076-3263/7/1/13/xml |
| article pdf uploaded. | 18 March 2017 08:16 CET | Version of Record | https://www.mdpi.com/2076-3263/7/1/13/pdf |
