| article html file updated | 7 February 2020 23:23 CET | Update | https://www.mdpi.com/2076-3921/6/1/13 |
| article html file updated | 23 September 2019 07:55 CEST | Update | N/A |
| article html file updated | 4 May 2019 11:16 CEST | Update | N/A |
| article html file updated | 29 March 2017 08:18 CEST | Update | N/A |
| article html file updated | 15 February 2017 11:16 CET | Original file | N/A |
| article xml uploaded. | 15 February 2017 11:08 CET | Original file | https://www.mdpi.com/2076-3921/6/1/13/xml |
| article pdf uploaded. | 15 February 2017 11:08 CET | Updated version of record | https://www.mdpi.com/2076-3921/6/1/13/pdf |
| article pdf uploaded. | 14 February 2017 12:54 CET | Version of Record | https://www.mdpi.com/2076-3921/6/1/13/pdf-vor |
