Paul H. J. Nederkoorn, Erna M. van Gelder, Gabriëlle M. Donné-Op den Kelder, Henk Timmerman: The agonistic binding site at the histamine H<sub>2</sub> receptor. II. Theoretical investigations of histamine binding to receptor models of the seven alpha-helical transmembrane domain. J. Comput. Aided Mol. Des. 10(5): 479-489 (1996)