| article html file updated | 7 February 2020 22:29 CET | Update | https://www.mdpi.com/2079-9721/5/1/3 |
| article html file updated | 23 September 2019 02:59 CEST | Update | N/A |
| article html file updated | 4 May 2019 13:04 CEST | Update | N/A |
| article html file updated | 4 February 2017 03:23 CET | Original file | N/A |
| article xml uploaded. | 4 February 2017 03:22 CET | Original file | https://www.mdpi.com/2079-9721/5/1/3/xml |
| article pdf uploaded. | 4 February 2017 03:22 CET | Updated version of record | https://www.mdpi.com/2079-9721/5/1/3/pdf |
| article pdf uploaded. | 30 January 2017 14:19 CET | Version of Record | https://www.mdpi.com/2079-9721/5/1/3/pdf-vor |
