Philippe André, Thierry Montmerle. From T Tauri stars to protostars: Circumstellar material and young stellar objects in the rho Ophiuchi cloud. „The Astrophysical Journal”. 420 (2), s. 837–862, 1994. DOI: 10.1086/173608. Bibcode: 1994ApJ...420..837A. (ang.).
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Philippe André: Observations of protostars and protostellar stages. [w:] The Cold Universe, Proceedings of the 28th Rencontre de Moriond, Les Arcs, France, March 13-20, 1993 [on-line]. 1994. s. 179. [dostęp 2016-03-02]. (ang.).
Philippe André, Thierry Montmerle. From T Tauri stars to protostars: Circumstellar material and young stellar objects in the rho Ophiuchi cloud. „The Astrophysical Journal”. 420 (2), s. 837–862, 1994. DOI: 10.1086/173608. Bibcode: 1994ApJ...420..837A. (ang.).
