Sarvate, D.G. and Woldemariam, D.M. 2022. A note on $GDD(1, n, n , 4;\lambda_{1},\lambda_{2})$. Journal of Algebra Combinatorics Discrete Structures and Applications. 9, 2 (Apr. 2022), 85–99. DOI:https://doi.org/10.13069/jacodesmath.1111720.