by WILKING, B. A, MUNDY, L. G, BLACKWELL, J. H, HOWE, J. E
Published in The Astrophysical journal (01.10.1989)

by Jaffe, D. T., Howe, J. E., Genzel, R., Harris, A. I., Stacey, G. J.
Published in The Astrophysical journal (10.04.1990)

by Howe, J.E., Heald, C.W., Bibb, T.L.
Published in Journal of dairy science (01.06.1975)