Thanh Nhieu, V., Cong Tam, N. and Van Tho, C. (2000) “REGULARIZED SOLUTIONS OF A CAUCHY PROBLEM FOR THE HELMHOLTZ EQUATION IN AN IRREGULAR STRIP: THE ERROR ESTIMATES”, Science and Technology Development Journal, 3(9&10), pp. 9-15. doi: https://doi.org/10.32508/stdj.v3i9&10.3590.