15 May 2000 / 2000, "Star Formation from the Small to the Large Scale", Proc. 33rd ESLAB Symp, ESA SP-445, eds.F.Favata, A.A. Kaas, & Wilson (Noordwijk: ESA), 87-98
28 Dec 1999 / Published in "Star Formation from the Small to the Large Scale", eds. F. Favata, A. Kaas, & A. Wilson (ESA SP-445, ESA, Noordwijk, 2000), p. 13