| article html file updated | 9 February 2020 10:43 CET | Update | https://www.mdpi.com/2225-1146/6/2/15 |
| article html file updated | 1 October 2019 20:22 CEST | Update | N/A |
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| article html file updated | 26 June 2018 04:56 CEST | Update | N/A |
| article pdf uploaded. | 23 March 2018 05:31 CET | Updated version of record | https://www.mdpi.com/2225-1146/6/2/15/pdf |
| article html file updated | 23 March 2018 05:28 CET | Original file | N/A |
| article xml uploaded. | 23 March 2018 05:26 CET | Update | https://www.mdpi.com/2225-1146/6/2/15/xml |
| article pdf uploaded. | 23 March 2018 05:26 CET | Updated version of record | https://www.mdpi.com/2225-1146/6/2/15/pdf-vor |
| article pdf uploaded. | 21 March 2018 16:49 CET | Version of Record | https://www.mdpi.com/2225-1146/6/2/15/pdf-vor |