The MDFTSP instances may be downloaded from the following link:
https://www.dropbox.com/s/0752vg5imgrf1wh/Benchmark%20instances%20for%20the%20MDFTSP.zip?dl=0
The instances must be read in the following manner:
1st line: |N| |D| L V
2nd line: List of the number of family members (nl)
3rd line: List of the number of family visits (vl)
4th line until the end: Cost matrix (cij)