Indigeneity of organic matter in fossils: a test using stable isotope analysis of amino acid enantiomers in Quaternary mollusk shells.

Por Engel, M H, Goodfriend, G A, Qian, Y, Macko, S A
Publicado em 1994

Documenting the diet in ancient human populations through stable isotope analysis of hair.

Por Macko, S A, Engel, M H, Andrusevich, V, Lubec, G, O'Connell, T C, Hedges, R E
Publicado em 1999

4-Norleucine, 7-D-phenylalanine-alpha-melanocyte-stimulating hormone: a highly potent alpha-melanotropin with ultralong biological activity.

Por Sawyer, T K, Sanfilippo, P J, Hruby, V J, Engel, M H, Heward, C B, Burnett, J B, Hadley, M E
Publicado em 1980