R. Thompson, S. Gibson, and P. Leat, “Overt and Cryptic Strongly Potassic Mafic Liquids in the Neogene Magmatism of the Northernmost Part of the Rio Grande Rift, USA: A Lithospheric Drip-Feed into a Asthenospheric-source Magmas?”, IKC abstracts, vol. 5, pp. 420–422, Feb. 1991.