Calculation of effective T and S form factors with the single-logarithm accuracy

Summing up all the graphs containing at least one logarithm ln(Qsup(2)/qsub(t)sup(2)) per each coupling constant αsub(s), corrections are calculated to the double-logarithm formulae for the effective T and Sudakov form factors. The accuracy of the obtained expresssions is approximately 1+O(αsub(s), αsub(s)sup(2)lnsup(2)(Qsup(2)/qsub(t)sup(2))) enabling one to use them for description of the available experimental data in an ample interval of the momentum transfers qsub(t)