@article{10_4064_cm142_2_8,
     author = {Yong Zhang},
     title = {Some observations on the {Diophantine} equation $f(x)f(y)=f(z)^2$},
     journal = {Colloquium Mathematicum},
     pages = {275--283},
     publisher = {mathdoc},
     volume = {142},
     number = {2},
     year = {2016},
     doi = {10.4064/cm142-2-8},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm142-2-8/}
}