@inproceedings{Shintani:2012Cc, author = "Shintani, Eigo", title = "{Error reduction technique using covariant approximation and application to nucleon form factor }", doi = "10.22323/1.164.0262", booktitle = "Proceedings of The 30th International Symposium on Lattice Field Theory {\textemdash} PoS(Lattice 2012)", year = 2012, volume = "164", pages = "262" }