1. A method performed using a computer system, the method comprising: receiving, from a client device over a network, a search query; performing a first search to identify a set of search results based on the received search query; presenting the identified set of search results for display on the client device; receiving, from the client device, selection of one search result of the identified set of search results; presenting, for display on the client device, a reference page associated with a scanned document associated with the selected one search result of the identified set of search results, the reference page comprising information regarding the scanned document and a plurality of links, each link of the plurality of links being associated with a second search associated with an attribute associated with the scanned document; receiving, from the client device, selection of a link from the plurality of links; performing the second search, based on the received selection of the link, to identify web documents based on the attribute associated with the scanned document; and presenting, based on the performed second search, a result of the second search for display on the client device as a second reference page associated with the scanned document, the second reference page including information regarding the identified web documents and a link associated with an additional search associated with the attribute.