and Sullivan, D., String topology, arXiv: math-GT/9911159. Lian, B.H., Zuckerman, G.J., New perspectives on the BRST-algebraic structure of string theory
of his fundamental contributions to a wide range of topics in geometry, topology, analysis and theoretical physics" “以表彰他在几何学、拓扑学、分析和理论物理学等多个领域的基础贡献” 1989年