1. Aggarwal N and Jha N 2013 Permian palynostratigraphy and palaeoclimate of Lingala−Koyagudem coal belt, Godavari Graben, Andhra Pradesh, India; J. Asian Earth Sci. 64 38–57.
2. Aggarwal N, Carvalho M, Jha N and Thakur B 2017 Palynology and palynofacies of the Permian strata in the Kothagudem sub-basin, Andhra Pradesh, Southern India; J. Palaeontol. Soc. India 62(2) 175–186.
3. Aitken G A 1994 Permian palynomorphs from the Number 5 seam, Ecca Group, Witbank Highveld Coalfields, South Africa; Palaeontol. Afr. 31 97–109.
4. Anand-Prakash and Srivastava S C 1984 Miofloral studies of the Lower Gondwana sediments in Johilla Coalfield, Madhya Pradesh, India; Palaeobotanist 32 243−252.
5. Anderson J M 1977 The biostratigraphy of the Permian and Triassic. Part 3: A review of Gondwana palynology with particular reference to the northern Karoo basin, South Africa; Mem. Bot. Surv. S. Afr. 41 1–133.