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Subclassification references

• Alewijnse, Bart and Nerbonne, John and van der Veen, Lolke J. and Manni, Franz 2007
• Adam, Jean Jerome 1954
• Bouka, Léonce Yembi and Ndamba, Josué 1992
• Niama-Niama, Japhet 2022
• Rébecca Grollemund 2012
• Pacchiarotti, Sara and Chousou-Polydouri, Natalia and Bostoen, Koen 2019

Comments on subclassification

Pacchiarotti, Sara and Chousou-Polydouri, Natalia and Bostoen, Koen 2019: 163 , 184, 186 Niama-Niama, Japhet 2022 Adam, Jean Jerome 1954: 50-52 Bouka, Léonce Yembi and Ndamba, Josué 1992: 42-45 Alewijnse, Bart and Nerbonne, John and van der Veen, Lolke J. and Manni, Franz 2007 Rébecca Grollemund 2012: 380