RT Journal T1 ON THE BOUNDS OF THE PERIMETER OF AN ELLIPSE A1 赵铁洪, 王淼坤, 褚玉明 PB 数学物理学报(英文版) FD 2022-04-25 YR 2022 JF Acta Mathematica Scientia JO 数学物理学报(英文版) VO 42 IS 2 SP 491 DO 10.1007/s10473-022-0204-y K1 Gaussian hypergeometric function;complete elliptic integral;ellipse;perimeter LK {http://121.43.60.238/sxwlxbB/CN/article/article_16665.shtml}