1. Anders, E.: 1973, in: M.A. Gordon and L.E. Snyder (eds.),Molecules in the Galactic Environment, Wiley, New York, pp. 430?442.
2. Anders, E.: 1989,Nature 342, 255.
3. Anders, E., Hayatsu, R. and Studier, M.H.: 1974,Astrophys. J. Letters 192, L101.
4. Basiuk, V.A. and Navarro-Gonzalez R.: 1995,Orig. Life,25, 457.
5. Basiuk, V.A. and Navarro-Gonzalez, R.: 1996,Orig. Life, in press.