| article html file updated | 8 February 2020 01:03 CET | Update | https://www.mdpi.com/2077-0472/7/3/21 |
| article html file updated | 23 September 2019 17:29 CEST | Update | N/A |
| article html file updated | 4 May 2019 07:37 CEST | Update | N/A |
| article html file updated | 28 March 2017 03:05 CEST | Update | N/A |
| article html file updated | 9 March 2017 11:02 CET | Original file | N/A |
| article xml uploaded. | 9 March 2017 11:01 CET | Original file | https://www.mdpi.com/2077-0472/7/3/21/xml |
| article pdf uploaded. | 9 March 2017 11:01 CET | Updated version of record | https://www.mdpi.com/2077-0472/7/3/21/pdf |
| article pdf uploaded. | 8 March 2017 11:17 CET | Version of Record | https://www.mdpi.com/2077-0472/7/3/21/pdf-vor |
