@article{articlef0719966,
title   = {On surfaces obtained as singular loci of normal congruence of frontals with pure-frontal singular points},
author = {Santos, Samuel Paulino dos and Teramoto, Keisuke},
year = {2025},
doi = {10.1007/s13398-025-01789-y},
journal   = {Revista de la Real Academia de Ciencias Exactas, Fisicas y Naturales : Serie A : Matematicas}
}