Kuntz, Paul G.  "Lotze as a Process Philosopher."  Idealistic Studies 9 (Sept. 1979): 229-42.

Abstract

In recent years we have come to recognize process philosophy as a distinct type, and there has been a search for its ancestry.  This paper argues from George Santayana's "Lotze's System of Philosophy", which the author edited in 1971, that there is a very close similarity between the metaphysics of Rudolf Hermann Lotze (1817-1881) and that of Alfred North Whitehead.  They had been recognized as "philosophical cousins" by Philippe Devaux.  Although there is no evidence of Whitehead's directly reading Lotze, so prominent was Lotze during "the Lotzean period of Anglo-American philosophy" that Whitehead could not have been ignorant of this possibility of building a system.  [Abstract from The Philosopher's Index]