@article{Ballico_Piene_Tai_1992, title={A Characterization of Balanced Rational Normal Surface Scrolls in Terms of Their Osculating Spaces II.}, volume={70}, url={https://www.mscand.dk/article/view/12397}, DOI={10.7146/math.scand.a-12397}, journal={MATHEMATICA SCANDINAVICA}, author={Ballico, E. and Piene, R. and Tai, H. -s.}, year={1992}, month={Jun.}, pages={204–206} }