| article html file updated | 7 February 2020 03:06 CET | Update | https://www.mdpi.com/2079-9276/5/1/2 |
| article html file updated | 6 May 2019 03:11 CEST | Update | N/A |
| article html file updated | 26 March 2019 17:51 CET | Update | N/A |
| article html file updated | 8 June 2016 06:39 CEST | Original file | N/A |
| article pdf uploaded. | 8 January 2016 09:40 CET | Updated version of record | https://www.mdpi.com/2079-9276/5/1/2/pdf |
| article xml uploaded. | 8 January 2016 09:40 CET | Update | https://www.mdpi.com/2079-9276/5/1/2/xml |
| article pdf uploaded. | 6 January 2016 15:17 CET | Version of Record | https://www.mdpi.com/2079-9276/5/1/2/pdf-vor |
