JACOBSEN H. (1977).- Lexicon of Succulent Plants.- Poole-Blandford & New-York Humanities, 1069 ill., 682 p.

JACOBSEN N. (1988).- Euphorbias of the Skeleton Coast National Park : Namibia & Adjacent Areas.- Euph. Journ., 5, pp. 58-67. [E. virosa, glanduligera, damarana, lignosa, phylloclada, guerichiana, giessii]

JACOBSEN N. (1994).- Kaokoveld Euphorbias.- Euph. Journ., 9, pp. 154-173. [E. virosa, guerichiana, subsalsa ssp. fluvialis, eduardoi, monteiroi, kaokoensis, cf. berotica, volkmanniae]

JAFRI S.M.H. & EL-GADI A. (1982).-, Euphorbiaceae of Libya.- Flora of Libya, 89, pp. 1-53. [only herbaceous forms]

JANKALSKI S. (2005).- Hybrids in succulent Euphorbia.- Euphorbia World, 1, 1, pp.17-20.

JINDAL R. (1990).- Euphorbia acaulis Roxb. – Euphorbia fusiformis.- The Euphorbiaceae Study Group Bull., 3, 2, pp. 30-35.

JONKERS B. (1994).- A Taste of Southern Somalia.- Euph. Journ., 9, pp. 124-146. [E. breviarticulata, cuneata, actinoclada, glochidiata, schizacantha, erlangeri, pirottae, gossypina]

JONKERS B. (1994).- Distribution and Habitat of Euphorbia in Oman.- Euph. Journ., 9, pp. 30-62. [E. granulata var. glabrata, larica, arabica, riebeckii, pirottae, orbiculifolia, balsamifera ssp. adenensis, cactus, schimperi, aff. uzmuk, hadramautica]

JORGENSEN P. M. & LÉON-YANEZ S. edit. (1999).- Catalogue of the vascular plants of Ecuador.- Missouri Botanical Garden Press, VIII, 1181 p. [Euphorbia -Chamaesyce - pp. 458-459 : abdita, amplexicaulis, bindloensis, dioeca, galapageia, hirta, hypericifolia, hyssopifolia, jamesonii, lasiocarpa, melanocarpa, nummularia, nutans, ophtalmica, orbiculata, prostrata, punctulata, quitensis, recurva, ruiziana, serpens, thymifolia, viminea ; Euphorbia s.s.- pp. 462-463 - : adiantoides, arenaria, cestrifolia, cotinifolia, cyathophora, dwyeri, equisetiformis, graminea, heterophylla, insulana, lactea, laurifolia, milii, moeringoides, peplus, pulcherrima, spruceana, tirucalli, viridis]