| article html file updated | 8 February 2020 08:19 CET | Update | https://www.mdpi.com/2311-553X/3/2/21 |
| article html file updated | 25 September 2019 08:39 CEST | Update | N/A |
| article html file updated | 3 May 2019 17:23 CEST | Update | N/A |
| article html file updated | 29 June 2017 11:40 CEST | Update | N/A |
| article html file updated | 16 June 2017 03:39 CEST | Original file | N/A |
| article xml uploaded. | 16 June 2017 03:37 CEST | Original file | https://www.mdpi.com/2311-553X/3/2/21/xml |
| article pdf uploaded. | 16 June 2017 03:37 CEST | Updated version of record | https://www.mdpi.com/2311-553X/3/2/21/pdf |
| article pdf uploaded. | 14 June 2017 15:38 CEST | Version of Record | https://www.mdpi.com/2311-553X/3/2/21/pdf-vor |
