| article html file updated | 7 February 2020 20:15 CET | Update | https://www.mdpi.com/1422-0067/18/1/28 |
| article html file updated | 22 September 2019 14:52 CEST | Update | - |
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| article html file updated | 24 December 2016 06:20 CET | Original file | - |
| article xml uploaded. | 24 December 2016 06:18 CET | Original file | https://www.mdpi.com/1422-0067/18/1/28/xml |
| article pdf uploaded. | 24 December 2016 06:18 CET | Version of Record | https://www.mdpi.com/1422-0067/18/1/28/pdf |
