| article html file updated | 7 February 2020 19:01 CET | Update | https://www.mdpi.com/1422-0067/17/12/2021 |
| article html file updated | 22 September 2019 08:31 CEST | Update | N/A |
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| article html file updated | 29 June 2017 13:16 CEST | Update | N/A |
| article html file updated | 27 December 2016 11:01 CET | Update | N/A |
| article html file updated | 2 December 2016 13:13 CET | Original file | N/A |
| article xml uploaded. | 2 December 2016 13:12 CET | Original file | https://www.mdpi.com/1422-0067/17/12/2021/xml |
| article pdf uploaded. | 2 December 2016 13:12 CET | Version of Record | https://www.mdpi.com/1422-0067/17/12/2021/pdf |
