| article html file updated | 9 February 2020 05:08 CET | Update | https://www.mdpi.com/2304-8158/7/2/18 |
| article html file updated | 30 September 2019 10:15 CEST | Update | - |
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| article html file updated | 14 March 2018 12:21 CET | Update | - |
| article html file updated | 1 February 2018 15:48 CET | Original file | - |
| article xml uploaded. | 1 February 2018 09:47 CET | Original file | https://www.mdpi.com/2304-8158/7/2/18/xml |
| article pdf uploaded. | 1 February 2018 09:47 CET | Version of Record | https://www.mdpi.com/2304-8158/7/2/18/pdf |
