Yong-Li Fan, W John Kress, Qing-Jun Li 2015, 'A New Secondary Pollen Presentation Mechanism from a Wild Ginger (Zingiber densissimum)and Its Functional Roles in Pollination Process.', PLoS ONEhttp://europepmc.org/articles/PMC4670160?pdf=render. Retrieved from PLOS CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)

Arfan Ali, Shelley Jansky 2015, 'Fine Screening for Resistance to Cold-Induced Sweetening in Potato Hybrids ContainingSolanum raphanifolium Germplasm', Advances in Agriculturehttp://dx.doi.org/10.1155/2015/327969. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)

Luciana Coe Girão, Ariadna Valentina Lopes, Marcelo Tabarelli, Emilio M Bruna 2007, 'Changes in tree reproductive traits reduce functional diversity in a fragmented Atlanticforest landscape.', PLoS ONEhttp://europepmc.org/articles/PMC1975471?pdf=render. Retrieved from PLOS CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)

Isabel C. Machado, Ariadna V. Lopes, Marlies Sazima 2010, 'Contrasting bee pollination in two co-occurring distylic species of Cordia (Cordiaceae,Boraginales) in the Brazilian semi-arid Caatinga: generalist in C. globosa vs. specialistin C. leucocephala', Anais da Academia Brasileira de Ciênciashttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000400010. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)

Vineet Kumar Singh, Chandan Barman, Rajesh Tandon 2014, 'Nectar Robbing Positively Influences the Reproductive Success of Tecomella undulata(Bignoniaceae)', PLoS ONE10.1371/journal.pone.0102607. Retrieved from PLOS CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)

Güler Yasemin, Dikmen Fatih, Özdem Ayşe 2015, 'Evaluation of Bee Diversity within Different Sweet Cherry Orchards in the SultandağiReservoir (Turkey)', Journal of Apicultural Sciencehttp://www.degruyter.com/view/j/jas.2015.59.issue-2/jas-2015-0017/jas-2015-0017.xml?format=INT. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)

Cândida H. T. M. Conagin 1961, 'Microsporogênese, incompatibilidade e esterilidade masculina em Coffea congensis froehnerMicrosporogenesis, incompatibility, and male sterility in Coffea congensis', Bragantiahttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051961000100027. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)

Nikolić Dragan, Milatović Dragan 2010, 'Examining self-compatibility in plum (Prunus domestica L.) by fluorescence microscopy',Genetikahttp://www.doiserbia.nb.rs/img/doi/0534-0012/2010/0534-00121002387N.pdf. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)

Phillip A Salisbury, Yvonne J Fripp, Allison M Gurung, Warren M Williams 2017, 'Is floral structure a reliable indicator of breeding system in the Brassicaceae?',PLoS ONEhttp://europepmc.org/articles/PMC5360323?pdf=render. Retrieved from PLOS CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)