| article html file updated | 7 February 2020 23:00 CET | Update | https://www.mdpi.com/2075-4701/7/2/51 |
| article html file updated | 23 September 2019 05:49 CEST | Update | N/A |
| article html file updated | 4 May 2019 12:02 CEST | Update | N/A |
| article html file updated | 1 March 2017 03:52 CET | Update | N/A |
| article html file updated | 13 February 2017 04:08 CET | Original file | N/A |
| article xml uploaded. | 13 February 2017 04:07 CET | Original file | https://www.mdpi.com/2075-4701/7/2/51/xml |
| article pdf uploaded. | 13 February 2017 04:07 CET | Updated version of record | https://www.mdpi.com/2075-4701/7/2/51/pdf |
| article pdf uploaded. | 9 February 2017 16:09 CET | Version of Record | https://www.mdpi.com/2075-4701/7/2/51/pdf-vor |
