Immanuel Kant
Kant developed his moral philosophy in three works: "Groundwork of the Metaphysic of Morals" (1785), "Critique of Practical Reason" (1788), and "Metaphysics of Morals" (1797).
Erich Adickes
Another important work written by Adickes is entitled "German Kantian Bibliography - Writings by and on Kant which have appeared in Germany up to the end of 1887" (Boston: Ginn & Company, 1896) ( Note: This bibliography closes with the year 1804, the date of Kant's death, and does not extend to 1887 as stated in the title of the work.)