| article html file updated | 8 February 2020 05:09 CET | Update | https://www.mdpi.com/1422-0067/18/5/991 |
| article html file updated | 24 September 2019 16:13 CEST | Update | - |
| article html file updated | 3 May 2019 23:21 CEST | Update | - |
| article html file updated | 1 June 2017 11:13 CEST | Update | - |
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| article html file updated | 5 May 2017 13:50 CEST | Original file | - |
| article xml uploaded. | 5 May 2017 13:49 CEST | Original file | https://www.mdpi.com/1422-0067/18/5/991/xml |
| article pdf uploaded. | 5 May 2017 13:49 CEST | Version of Record | https://www.mdpi.com/1422-0067/18/5/991/pdf |
