Terrell, Edward E.; Lewis, Walter H. (1990). "Oldenlandiopsis (Rubiaceae), a New Genus from the Caribbean Basin, Based on Oldenlandia callitrichoides Grisebach". Brittonia. 42 (3): 185–190. Bibcode:1990Britt..42..185T. doi:10.2307/2807214. JSTOR2807214.
harvard.edu
ui.adsabs.harvard.edu
Terrell, Edward E.; Lewis, Walter H. (1990). "Oldenlandiopsis (Rubiaceae), a New Genus from the Caribbean Basin, Based on Oldenlandia callitrichoides Grisebach". Brittonia. 42 (3): 185–190. Bibcode:1990Britt..42..185T. doi:10.2307/2807214. JSTOR2807214.
jstor.org
Terrell, Edward E.; Lewis, Walter H. (1990). "Oldenlandiopsis (Rubiaceae), a New Genus from the Caribbean Basin, Based on Oldenlandia callitrichoides Grisebach". Brittonia. 42 (3): 185–190. Bibcode:1990Britt..42..185T. doi:10.2307/2807214. JSTOR2807214.