A. Di Lorenzo, “The safety of pneumococcal vaccines at the time of sequential schedule: data from surveillance of adverse events following 13-valent conjugated pneumococcal and 23-valent polysaccharidic pneumococcal vaccines in newborns and the elderly, in Puglia (Italy)”, Ann Ig, vol. 35, no. 4, pp. 459–467, Aug. 2025, doi: 10.7416/ai.2023.17630.