@article{10_4064_aa158_3_2,
     author = {Dongho Byeon and Donggeon Yhee},
     title = {Optimal curves differing by a 3-isogeny},
     journal = {Acta Arithmetica},
     pages = {219--227},
     publisher = {mathdoc},
     volume = {158},
     number = {3},
     year = {2013},
     doi = {10.4064/aa158-3-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa158-3-2/}
}