TY - RPRT TI - Exact solution to localized-induction-approximation equation modeling smoke ring motion. AU - J Cieslinski AU - PK Gragert AU - A Sym PY - 1986 DO - 10.1103/physrevlett.57.1507 UR - https://pubmed.ncbi.nlm.nih.gov/10033471/ ID - 10033471 ER -