| article html file updated | 9 February 2020 01:25 CET | Update | https://www.mdpi.com/1996-1073/11/1/55 |
| article html file updated | 29 September 2019 13:00 CEST | Update | N/A |
| article html file updated | 2 May 2019 05:39 CEST | Update | N/A |
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| article html file updated | 28 December 2017 13:59 CET | Original file | N/A |
| article xml uploaded. | 28 December 2017 13:58 CET | Original file | https://www.mdpi.com/1996-1073/11/1/55/xml |
| article pdf uploaded. | 28 December 2017 13:58 CET | Version of Record | https://www.mdpi.com/1996-1073/11/1/55/pdf |
