By Jeffrey C. Lagarias and Robert C. Rhoades. Ramanujan Journal 41, 191–232 (2016), DOI doi.org/10.1007/s11139-015-9729-1 . The preprint was submitted in 2015.
Verified locators: preprint pages 1–2, equations (1.1)–(1.2), modularity, growth condition and iterated Laplacian; pages 3–4, Theorem 1.1 and construction of a Taylor basis from Eisenstein series.