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- The Fischer-Marsden conjecture on almost Kenmotsu manifolds pp.1727-933X, 2020, https://doi.org/10.2989/16073606.2018.1533499
- The Fischer–Marsden conjecture on non-Kenmotsu $$(\kappa , \mu )^\prime $$(κ,μ)′-almost Kenmotsu manifolds vol.110, pp.1, 2019, https://doi.org/10.1007/s00022-018-0457-8