| article html file updated | 9 February 2020 10:35 CET | Update | https://www.mdpi.com/2077-0383/7/4/61 |
| article html file updated | 1 October 2019 19:35 CEST | Update | - |
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| article html file updated | 22 March 2018 13:28 CET | Update | - |
| article xml uploaded. | 22 March 2018 13:27 CET | Update | https://www.mdpi.com/2077-0383/7/4/61/xml |
| article pdf uploaded. | 22 March 2018 13:27 CET | Updated version of record | https://www.mdpi.com/2077-0383/7/4/61/pdf |
| article html file updated | 21 March 2018 05:49 CET | Original file | - |
| article pdf uploaded. | 21 March 2018 05:48 CET | Version of Record | https://www.mdpi.com/2077-0383/7/4/61/pdf-vor |
