| article html file updated | 8 February 2020 02:05 CET | Update | https://www.mdpi.com/2075-1729/7/2/13 |
| article html file updated | 4 May 2019 05:21 CEST | Update | N/A |
| article html file updated | 30 June 2017 05:45 CEST | Update | N/A |
| article html file updated | 27 March 2017 05:28 CEST | Update | N/A |
| article html file updated | 23 March 2017 15:43 CET | Original file | N/A |
| article xml uploaded. | 23 March 2017 15:42 CET | Original file | https://www.mdpi.com/2075-1729/7/2/13/xml |
| article pdf uploaded. | 23 March 2017 15:42 CET | Version of Record | https://www.mdpi.com/2075-1729/7/2/13/pdf |
