| article html file updated | 7 February 2020 20:08 CET | Update | https://www.mdpi.com/1422-0067/18/1/19 |
| article html file updated | 22 September 2019 14:19 CEST | Update | - |
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| article html file updated | 22 December 2016 11:55 CET | Original file | - |
| article xml uploaded. | 22 December 2016 11:54 CET | Original file | https://www.mdpi.com/1422-0067/18/1/19/xml |
| article pdf uploaded. | 22 December 2016 11:54 CET | Version of Record | https://www.mdpi.com/1422-0067/18/1/19/pdf |
