#author                pi_cent   pi_err     K_cent   K_err
Garwin_1957            1.00      0.10       -1.      0.
Bardon_1959            0.97      0.05       -1.      0.
Ali_Zade_1959          0.97      0.06       -1.      0.
Plano_1960             0.94      0.07       -1.      0.
Akhmanov_1968          0.975     0.015      -1.      0.
Hayano_1984            -1.       0.         0.970     0.047
Imazato_1992           -1.       0.         1.0013    0.0061
Beltrami_1987          1.0027    0.0084       -1.      0.
Jamieson_2006          1.0003    0.0038       -1.      0.