- 2023.
Retrieved 15
March 2023 – via
Google Books. Nigatu, H****en; Yihun,
Yimesker (2020), Laroc****e, Pierre; McCarthy, J.
Michael (eds.), "Algebraic Insight...
- the
original on 2021-04-15.
Retrieved 2020-11-15. Nigatu, H****en; Yihun,
Yimesker (2020). "Algebraic
Insight on the
Concomitant Motion of 3RPS and 3PRS PKMS"...
- Ind Robots; Sydney,
Australia (1988), pp. 91-100 Nigatu, H****en; Yihun,
Yimesker (2020), Laroc****e, Pierre; McCarthy, J.
Michael (eds.), "Algebraic Insight...