In 1991 Sergio was co-author with his brother Humberto of the three bronze monuments of 8 ft. (2.46m); each dedicated to Ricardo Palmerin, Guty Cárdenas and José Domínguez; Mexican Bolero composers and songwriters from the Yucatán area of Mexico.In 1992 Sergio made the bronze monument of 7 ft. 2.15m)dedicated to Ruben Pabello, newspaper director in the city of Xalapa, Mexico, and became a member of the International Sculpture Center in Washington, DC.He met many famous art people including Rhodia Bourdelle, Maria Felix, Antoine Tsvapoff, Sculptor Cesar Baldiaccian, the 'bande dessinateur' Albert Uderzo, and French painter, Mandrisse, who let Sergio use his gallery's basement to paint his oil canvases.Sergio's most acclaimed solo exposition was 'Animas y Perros' (Animals and Dogs) at the Museo del Tempo Mayor INAH (Aztec Temple Museum), Mexico City.This was the first time Sergio presented his creations of 'Xolo-Sculptures (the subject was a contemporary view of the Mexican hairless dog, xoloitzcuintli, which appears in the myths of the ancient pre-Columbian cultures).