1. Blaya, Abreu: R., Bory Reyes, J., Guzmán Adán, A., Schneider, B.: Boundary value problems for the Cimmino system via quaternionic analysis. Appl. Math. Comp. 219, 3872–3881 (2012)
2. Blaya, Abreu: R., Bory Reyes, J., Schneider, B.: On Cauchy type integrals related to the Cimmino system of partial differential equations. Oper. Theory Adv. Appl. 242, 8192 (2014)
3. Blaya, R.A., Reyes, J.B., Luna-Elizarrarás, M.E., Shapiro, M.: $$\bar{\partial }$$ ∂ ¯ -problem in domains of $${\mathbb{C}}^2$$ C 2 in terms of hyper-conjugate harmonic functions. Complex Var. Elliptic Equ. 57(7–8), 743–749 (2012)
4. Brackx, F., Delanghe, R., Sommen, F.: On conjugate harmonic functions in Euclidean space. Math. Methods Appl. Sci. 25(16–18), 1553–1562 (2002)
5. Caramuta, P., Cialdea, A.: Some applications of the theory of self-conjugate differential forms. Bull. TICMI 18(2), 18–35 (2014)