| article html file updated | 8 February 2020 23:40 CET | Update | https://www.mdpi.com/2220-9964/6/12/401 |
| article html file updated | 29 September 2019 02:50 CEST | Update | - |
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| article html file updated | 2 January 2018 18:51 CET | Update | - |
| article html file updated | 10 December 2017 11:35 CET | Original file | - |
| article xml uploaded. | 10 December 2017 11:34 CET | Original file | https://www.mdpi.com/2220-9964/6/12/401/xml |
| article pdf uploaded. | 10 December 2017 11:34 CET | Version of Record | https://www.mdpi.com/2220-9964/6/12/401/pdf |
