Main sources used are
_ Explanatory Supplement to the Astronomical Almanac, ed. Seidelmann 2006,
contents identical to the 1992 edition and
_ Spherical astronomy, Robin M. Green 1985
On Apr. 02, 2012 John Tilley noted on the Yahoo eclipse mailing list SEML Message #14663:
"The 1992 Explanatory Supplement is NOT recommended, there are several mistakes in the formulae and no worked examples"
Here is a computational example for the total solar eclipse on 1961 Feb 15
from the "Explanatory Supplement to the Astronomical. Ephemeris and the American Ephemeris and Nautical Almanac" 1961, 4th impression 1977