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Anonym 1872: [Spring, F. A. J.] Rev. scient. France et Etrang. 2 (2), pp. 931-932
Dewalque 1872: [Spring, F. A. J.] Bull. Acad. Belg. (2) 33 (2), pp. 93-101
Schwann 1874: [Spring, F. A. J.] Annuaire / Academie Royale de Belgique, Bruxelles 40, S. 251-290
Selys-Longchamps 1872: [Spring, F. A. J.] Bull. Acad. Belg. (2) 33 (2), pp. 101-102