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Labandeira, C. C. The pollination of Mid Mesozoic seed plants and the early history of long-proboscid insects. Annals of the Missouri Botanical Garden. 2010, 97 (4): 469–513. S2CID 85767259. doi:10.3417/2010037.
Liu, Q.; Khramov, A. V.; Zhang, H.; Jarzembowski, E. A. Two new species of Kalligrammula Handlirsch, 1919 (Insecta, Neuroptera, Kalligrammatidae) from the Jurassic of China and Kazakhstan. Journal of Paleontology. 2015, 89 (3): 405–410. S2CID 130457192. doi:10.1017/jpa.2015.25.
Labandeira, C. C. The pollination of Mid Mesozoic seed plants and the early history of long-proboscid insects. Annals of the Missouri Botanical Garden. 2010, 97 (4): 469–513. S2CID 85767259. doi:10.3417/2010037.