Christopher A. Welty. Backtracking: the eternal flame. SIGART Bulletin, 12(1):39-40, 2001. [doi]
@article{Welty01, title = {Backtracking: the eternal flame}, author = {Christopher A. Welty}, year = {2001}, doi = {10.1145/376451.376470}, url = {http://doi.acm.org/10.1145/376451.376470}, researchr = {https://researchr.org/publication/Welty01}, cites = {0}, citedby = {0}, journal = {SIGART Bulletin}, volume = {12}, number = {1}, pages = {39-40}, }