Efficient microwave-assisted esterification of fusel oils using p-TsOH and 'H IND.3'P'W IND.12''O IND.40' as catalysts in solventless conditions: An eco-friendly 'green' protocol - Pérez, Eduardo R.; Carnevalli, Nélly C.; Cordeiro, Paulo Jorge Marques; Rodrigues Filho, Ubirajara Pereira; Franco, Douglas Wagner (Brazilian Meeting on Organic Synthesis, 2001)