Omer Berkman, Uzi Vishkin. Finding Level-Ancestors in Trees. J. Comput. Syst. Sci., 48(2):214-230, 1994.
@article{BerkmanV94, title = {Finding Level-Ancestors in Trees}, author = {Omer Berkman and Uzi Vishkin}, year = {1994}, researchr = {https://researchr.org/publication/BerkmanV94}, cites = {0}, citedby = {0}, journal = {J. Comput. Syst. Sci.}, volume = {48}, number = {2}, pages = {214-230}, }