@article{articleea21c5e3,
title   = {Singularities of affine equidistants: extrinsic geometry of surfaces in 4-space},
author = {Domitrz, W and Janeczko, S and Rios, Pedro Paulo de Magalhães and Ruas, Maria Aparecida Soares},
year = {2016},
doi = {10.1007/s00574-016-0208-0},
journal   = {Bulletin of the Brazilian Mathematical Society}
}