1.

2.

3. Yes.

4. The article was published online 15 October 2014, but the issue of International Mathematics Research Notes (IMRN) containing it was published in 2015. IMRN recommends the article be cited with the year 2015, and this is what is in the DOI database.

Q. Details for the marked citations follow:

[2] Zeitschrift für Physik B Condensed Matter volume 87, pages 341–354 (1992)
https://link.springer.com/article/10.1007%2FBF01309287

[10] J. Phys. I France 5 (1995) 805-813
https://jp1.journaldephysique.org/articles/jp1/abs/1995/07/jp1v5p805/jp1v5p805.html

[18] Proceedings of The 33rd International Symposium on Lattice Field Theory — PoS(LATTICE 2015) volume 251, pages 16 (2016)
https://pos.sissa.it/251/016/