Mechanics of Spaceflight Low-Thrust

By G. L. Grodzovskii, Yu. N. Ivanov, and V. V. Tokarev. Translated by A. Baruch. Israel program for Scientific Translations, Jerusalem, 1969. NASA Technical Translation F 507. Grodzovskiietal1969

Includes sections on solving for optimized trajectories for solar sails and radioactive isotope sails. This section is on pages 315-325.

This book is available for free at archive.org.