| article html file updated | 7 February 2020 06:59 CET | Update | https://www.mdpi.com/2311-5521/1/2/9 |
| article html file updated | 21 September 2019 14:43 CEST | Update | N/A |
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| article html file updated | 14 June 2016 22:34 CEST | Update | N/A |
| article xml uploaded. | 14 June 2016 03:54 CEST | Update | https://www.mdpi.com/2311-5521/1/2/9/xml |
| article pdf uploaded. | 14 June 2016 03:54 CEST | Updated version of record | https://www.mdpi.com/2311-5521/1/2/9/pdf |
| article html file updated | 8 April 2016 08:42 CEST | Original file | N/A |
| article pdf uploaded. | 8 April 2016 08:41 CEST | Version of Record | https://www.mdpi.com/2311-5521/1/2/9/pdf-vor |
